diff --git a/example.config.js b/example.config.js
index 92de30c..222355e 100644
--- a/example.config.js
+++ b/example.config.js
@@ -3,8 +3,8 @@ module.exports = {
   SERVER_ROOT: 'http://localhost:4040',
   EVENT_EXT: '/api/example/export_events/rows',
   CATEGORY_EXT: '/api/example/export_categories/rows',
-  EVENT_DESC_ROOT: '/api/example/export_events/ids',
-  TAG_TREE_EXT: '/api/example/export_tags/tree',
+  SOURCES_EXT: '/api/example/export_events/ids',
+  TAGS_EXT: '/api/example/export_tags/tree',
   SITES_EXT: '/api/example/export_sites/rows',
   MAP_ANCHOR: [31.356397, 34.784818],
   INCOMING_DATETIME_FORMAT: '%m/%d/%YT%H:%M',
diff --git a/src/actions/index.js b/src/actions/index.js
index 6da357e..77ead1b 100644
--- a/src/actions/index.js
+++ b/src/actions/index.js
@@ -1,8 +1,18 @@
+// TODO: move to util lib
+function urlFromEnv(ext) {
+  if (process.env[ext]) {
+    return `${process.env.SERVER_ROOT}${process.env[ext]}`
+  } else {
+    return null
+  }
+}
+
 // TODO: relegate these URLs entirely to environment variables
-const EVENT_DATA_URL = `${process.env.SERVER_ROOT}${process.env.EVENT_EXT}`
-const CATEGORY_URL = `${process.env.SERVER_ROOT}${process.env.CATEGORY_EXT}`
-const TAG_TREE_URL = `${process.env.SERVER_ROOT}${process.env.TAG_TREE_EXT}`
-const SITES_URL = `${process.env.SERVER_ROOT}${process.env.SITES_EXT}`
+const EVENT_DATA_URL = urlFromEnv('EVENT_EXT')
+const CATEGORY_URL = urlFromEnv('CATEGORY_EXT')
+const TAG_URL = urlFromEnv('TAGS_EXT')
+const SOURCES_URL = urlFromEnv('SOURCES_EXT')
+const SITES_URL = urlFromEnv('SITES_EXT')
 const eventUrlMap = (event) => `${process.env.SERVER_ROOT}${process.env.EVENT_DESC_ROOT}/${(event.id) ? event.id : event}`
 
 /*
@@ -97,110 +107,128 @@ export function updateDomain(domain) {
   }
 }
 
-export function fetchEvents (events) {
+
+export function fetchSelected(selected) {
+  if (!selected || !selected.length || selected.length === 0) {
+    console.log('hitting base')
+    return updateSelected([])
+  }
   return dispatch => {
-    dispatch(toggleFetchingEvents())
-    const urls = events.map(eventUrlMap)
-    return Promise.all(
-      urls.map(url => fetch(url)
-        .then(response => response.json())
-      )
-    )
-      .then(json => {
-        dispatch(toggleFetchingEvents())
-        return json
-      })
+    dispatch(updateSelected(selected))
+    if (!SOURCES_URL) {
+      dispatch(fetchSourceError('No source extension specified.'))
+    } else {
+      dispatch(toggleFetchingSources())
+    }
+
   }
 }
 
 export const UPDATE_HIGHLIGHTED = 'UPDATE_HIGHLIGHTED'
 export function updateHighlighted(highlighted) {
-    return {
-        type: UPDATE_HIGHLIGHTED,
-        highlighted: highlighted
-    }
+  return {
+    type: UPDATE_HIGHLIGHTED,
+    highlighted: highlighted
+  }
 }
 
 export const UPDATE_SELECTED = 'UPDATE_SELECTED'
 export function updateSelected(selected) {
-    return {
-        type: UPDATE_SELECTED,
-        selected: selected
-    }
+  return {
+    type: UPDATE_SELECTED,
+    selected: selected
+  }
 }
 
 export const UPDATE_DISTRICT = 'UPDATE_DISTRICT'
 export function updateDistrict(district) {
-    return {
-        type: UPDATE_DISTRICT,
-        district
-    }
+  return {
+    type: UPDATE_DISTRICT,
+    district
+  }
 }
 
 export const UPDATE_TAGFILTERS = 'UPDATE_TIMEFILTERS'
 export function updateTagFilters(tag) {
-    return {
-        type: UPDATE_TAGFILTERS,
-        tag
-    }
+  return {
+    type: UPDATE_TAGFILTERS,
+    tag
+  }
 }
 
 export const UPDATE_TIMERANGE = 'UPDATE_TIMERANGE';
 export function updateTimeRange(timerange) {
-    return {
-        type: UPDATE_TIMERANGE,
-        timerange
-    };
+  return {
+    type: UPDATE_TIMERANGE,
+    timerange
+  }
 }
 
 export const RESET_ALLFILTERS = 'RESET_ALLFILTERS'
 export function resetAllFilters() {
-    return {
-        type: RESET_ALLFILTERS
-    }
+  return {
+    type: RESET_ALLFILTERS
+  }
 }
 
 // UI
 
 export const TOGGLE_FETCHING_DOMAIN = 'TOGGLE_FETCHING_DOMAIN'
 export function toggleFetchingDomain() {
-    return {
-        type: TOGGLE_FETCHING_DOMAIN
-    }
+  return {
+    type: TOGGLE_FETCHING_DOMAIN
+  }
 }
 
-export const TOGGLE_FETCHING_EVENTS = 'TOGGLE_FETCHING_EVENTS'
-export function toggleFetchingEvents() {
-    return {
-        type: TOGGLE_FETCHING_EVENTS
-    }
+export const TOGGLE_FETCHING_SOURCES = 'TOGGLE_FETCHING_SOURCES'
+export function toggleFetchingSources() {
+  return {
+    type: TOGGLE_FETCHING_SOURCES
+  }
 }
 
 export const TOGGLE_LANGUAGE = 'TOGGLE_LANGUAGE';
 export function toggleLanguage(language) {
-    return {
-        type: TOGGLE_LANGUAGE,
-        language,
-    }
+  return {
+    type: TOGGLE_LANGUAGE,
+    language,
+  }
 }
 
 export const CLOSE_TOOLBAR = 'CLOSE_TOOLBAR';
 export function closeToolbar() {
-    return {
-        type: CLOSE_TOOLBAR
-    }
+  return {
+    type: CLOSE_TOOLBAR
+  }
 }
 
 export const TOGGLE_INFOPOPUP = 'TOGGLE_INFOPOPUP';
 export function toggleInfoPopup() {
-    return {
-        type: TOGGLE_INFOPOPUP
-    }
+  return {
+    type: TOGGLE_INFOPOPUP
+  }
 }
 
 export const TOGGLE_NOTIFICATIONS = 'TOGGLE_NOTIFICATIONS'
 export function toggleNotifications() {
-    return {
-        type: TOGGLE_NOTIFICATIONS
-    }
+  return {
+    type: TOGGLE_NOTIFICATIONS
+  }
+}
+
+export const MARK_NOTIFICATIONS_READ = 'MARK_NOTIFICATIONS_READ'
+export function markNotificationsRead() {
+  return {
+    type: MARK_NOTIFICATIONS_READ
+  }
+}
+
+// ERRORS
+
+export const FETCH_SOURCE_ERROR = 'FETCH_SOURCE_ERROR'
+export function fetchSourceError(msg) {
+  return {
+    type: FETCH_SOURCE_ERROR,
+    msg
+  }
 }
diff --git a/src/components/CardStack.jsx b/src/components/CardStack.jsx
index 8408f54..f5bc36e 100644
--- a/src/components/CardStack.jsx
+++ b/src/components/CardStack.jsx
@@ -22,7 +22,6 @@ class CardStack extends React.Component {
             event={event}
             language={this.props.language}
             tools={this.props.tools}
-            isLoading={this.props.isLoading}
             getNarrativeLinks={this.props.getNarrativeLinks}
             getCategoryGroup={this.props.getCategoryGroup}
             getCategoryColor={this.props.getCategoryColor}
@@ -54,15 +53,12 @@ class CardStack extends React.Component {
       <div
         id='card-stack-header'
         className='card-stack-header'
-        onClick={() => this.props.onToggle('TOGGLE_CARDSTACK')}
+        onClick={() => this.props.onToggleCardstack()}
       >
         <button className="side-menu-burg is-active"><span></span></button>
         <p className="header-copy top">
-          {(this.props.isLoading)
-            ? copy[this.props.language].loading
-            : `${this.props.selected.length} ${header_lang}`}
+          {`${this.props.selected.length} ${header_lang}`}
         </p>
-        {(this.props.isLoading) ? '' : this.renderLocation()}
       </div>
     )
   }
@@ -71,10 +67,7 @@ class CardStack extends React.Component {
     return (
       <div id="card-stack-content" className="card-stack-content">
         <ul>
-          {(this.props.isLoading)
-            ? <Card language={this.props.language} isLoading={true} />
-            : this.renderCards()
-          }
+          {this.renderCards()}
         </ul>
       </div>
     );
@@ -99,7 +92,7 @@ function mapStateToProps(state) {
     language: state.app.language,
     tools: state.ui.tools,
     isCardstack: state.ui.flags.isCardstack,
-    isLoading: state.ui.flags.isFetchingEvents
+    isFetchingSources: state.ui.flags.isFetchingSources
   }
 }
 
diff --git a/src/components/Dashboard.jsx b/src/components/Dashboard.jsx
index 344cc8e..783fd78 100644
--- a/src/components/Dashboard.jsx
+++ b/src/components/Dashboard.jsx
@@ -19,7 +19,7 @@ class Dashboard extends React.Component {
 
     this.handleHighlight = this.handleHighlight.bind(this);
     this.handleSelect = this.handleSelect.bind(this);
-    this.handleToggle = this.handleToggle.bind(this);
+    // this.handleToggle = this.handleToggle.bind(this);
     this.handleTagFilter = this.handleTagFilter.bind(this);
     this.updateTimerange = this.updateTimerange.bind(this);
 
@@ -46,32 +46,11 @@ class Dashboard extends React.Component {
   handleSelect(selected) {
     if (selected) {
       let eventsToSelect = selected.map(event => this.getEventById(event.id));
-      const parser = this.props.ui.tools.parser;
+      const p = this.props.ui.tools.parser;
 
-      eventsToSelect = eventsToSelect.sort((a, b) => {
-        return parser(a.timestamp) - parser(b.timestamp);
-      });
+      eventsToSelect = eventsToSelect.sort((a, b) => p(a.timestamp) - p(b.timestamp))
 
-      if (eventsToSelect.every(event => (event))) {
-        this.props.actions.updateSelected(eventsToSelect);
-      }
-
-      // Now fetch detail data for each event
-      // Add transmitter and receiver data for coevents
-      this.props.actions.fetchEvents(selected)
-        .then((events) => {
-          let eventsSelected = events.map(ev => {
-            return Object.assign({}, ev, this.getEventById(ev.id));
-          });
-
-          eventsSelected = eventsSelected.sort((a, b) => {
-            return parser(a.timestamp) - parser(b.timestamp);
-          });
-
-          this.props.actions.updateSelected(eventsSelected);
-        });
-    } else {
-      this.props.actions.updateSelected([]);
+      this.props.actions.fetchSelected(eventsToSelect)
     }
   }
 
@@ -83,23 +62,6 @@ class Dashboard extends React.Component {
     this.props.actions.updateTimeRange(timeRange);
   }
 
-  handleToggle( key ) {
-    switch( key ) {
-      case 'TOGGLE_CARDSTACK': {
-        this.props.actions.updateSelected([]);
-        break;
-      }
-      case 'TOGGLE_INFOPOPUP': {
-        this.props.actions.toggleInfoPopup();
-        break;
-      }
-      case 'TOGGLE_NOTIFICATIONS': {
-        this.props.actions.toggleNotifications();
-        break;
-      }
-    }
-  }
-
   getCategoryColor(category='other') {
     return this.props.ui.style.categories[category] || this.props.style.categories['other']
   }
@@ -113,41 +75,39 @@ class Dashboard extends React.Component {
   render() {
     return (
       <div>
-      <Viewport
+        <Viewport
           methods={{
-            select: this.handleSelect,
-            highlight: this.handleHighlight,
+            onSelect: this.handleSelect,
             getCategoryColor: category => this.getCategoryColor(category)
           }}
         />
         <Toolbar
-          filter={this.handleTagFilter}
-          toggle={ (key) => this.handleToggle(key) }
+          onFilter={this.handleTagFilter}
           actions={this.props.actions}
         />
         <CardStack
           onSelect={this.handleSelect}
           onHighlight={this.handleHighlight}
-          onToggle={this.handleToggle}
+          onToggleCardstack={() => this.props.actions.updateSelected([])}
           getNarrativeLinks={event => this.getNarrativeLinks(event)}
           getCategoryColor={category => this.getCategoryColor(category)}
         />
         <Timeline
-          onSelect={this.handleSelect}
-          onUpdateTimerange={this.updateTimerange}
-          // onHighlight={this.handleHighlight}
-          // onToggle={() => this.handleToggle('TOGGLE_CARDSTACK')}
-          getCategoryColor={category => this.getCategoryColor(category)}
+          methods={{
+            onSelect: this.handleSelect,
+            onUpdateTimerange: this.updateTimerange,
+            getCategoryColor: category => this.getCategoryColor(category)
+          }}
         />
         <InfoPopUp
           ui={this.props.ui}
           app={this.props.app}
-          toggle={() => this.handleToggle('TOGGLE_INFOPOPUP')}
+          toggle={() => this.props.actions.toggleInfoPopup()}
         />
         <Notification
           isNotification={this.props.ui.flags.isNotification}
           notifications={this.props.domain.notifications}
-          toggle={() => this.handleToggle('TOGGLE_NOTIFICATIONS')}
+          onToggle={this.props.actions.markNotificationsRead}
         />
         <LoadingOverlay
           ui={this.props.ui.flags.isFetchingDomain}
diff --git a/src/components/Notification.jsx b/src/components/Notification.jsx
index 18112b1..260befa 100644
--- a/src/components/Notification.jsx
+++ b/src/components/Notification.jsx
@@ -43,8 +43,8 @@ export default class Notification extends React.Component{
   }
 
   render() {
-    if (this.props.isNotification) {
-
+    const notificationsToRender = this.props.notifications.filter(n => !('isRead' in n && n.isRead))
+    if (notificationsToRender.length > 0) {
       return (
         <div className={`notification-wrapper`}>
           {this.props.notifications.map((notification) => {
@@ -52,7 +52,7 @@ export default class Notification extends React.Component{
             return (
               <div className='notification' onClick={() => this.toggleDetails() }>
                 <button
-                  onClick={() => this.props.toggle()}
+                  onClick={this.props.onToggle}
                   className="side-menu-burg over-white is-active"
                 >
                   <span />
diff --git a/src/components/Timeline.jsx b/src/components/Timeline.jsx
index 234d434..74e6455 100644
--- a/src/components/Timeline.jsx
+++ b/src/components/Timeline.jsx
@@ -19,13 +19,7 @@ class Timeline extends React.Component {
       dom: this.props.dom
     }
 
-    const methods = {
-      onSelect: this.props.onSelect,
-      onUpdateTimerange: this.props.onUpdateTimerange,
-      getCategoryColor: this.props.getCategoryColor
-    }
-
-    this.timeline = new TimelineLogic(this.props.app, ui, methods);
+    this.timeline = new TimelineLogic(this.props.app, ui, this.props.methods);
     this.timeline.update(this.props.domain, this.props.app);
     this.timeline.render(this.props.domain);
   }
diff --git a/src/components/Toolbar.jsx b/src/components/Toolbar.jsx
index e7eef11..d2fb5f8 100644
--- a/src/components/Toolbar.jsx
+++ b/src/components/Toolbar.jsx
@@ -170,7 +170,7 @@ class Toolbar extends React.Component {
           categories={this.props.categories}
           tagFilters={this.props.tagFilters}
           categoryFilters={this.props.categoryFilters}
-          filter={this.props.filter}
+          filter={this.props.onFilter}
           title={title}
           overview={overview}
           language={this.props.language}
@@ -189,7 +189,7 @@ class Toolbar extends React.Component {
               categories={this.props.categories}
               tagFilters={this.props.tagFilters}
               categoryFilters={this.props.categoryFilters}
-              filter={this.props.filter}
+              filter={this.props.onFilter}
             />
         </TabPanel>
       )
diff --git a/src/js/map/map.js b/src/js/map/map.js
index d05e555..8d84554 100644
--- a/src/js/map/map.js
+++ b/src/js/map/map.js
@@ -21,7 +21,6 @@ export default function(newApp, ui, methods) {
   }
 
   const getCategoryColor = methods.getCategoryColor;
-  const select = methods.select;
   const narrativeProps = ui.narratives;
 
     // Map Settings
@@ -272,7 +271,7 @@ Stop and start the development process in terminal after you have added your tok
                   ${lMap.latLngToLayerPoint(d.LatLng).y})`;
       })
       .on('click', (location) => {
-        select(location.events);
+        methods.onSelect(location.events);
       });
 
     const eventsDom = g.selectAll('.location')
diff --git a/src/reducers/domain.js b/src/reducers/domain.js
index 4e56634..dc798db 100644
--- a/src/reducers/domain.js
+++ b/src/reducers/domain.js
@@ -1,19 +1,32 @@
 import initial from '../store/initial.js'
 
-import { UPDATE_DOMAIN } from '../actions'
+import { UPDATE_DOMAIN, MARK_NOTIFICATIONS_READ } from '../actions'
 import { parseDateTimes } from './utils/helpers.js'
-import { validate } from './utils/validators.js'
+import { validateDomain } from './utils/validators.js'
 
 function updateDomain (domainState, action) {
   action.domain.events = parseDateTimes(action.domain.events)
 
-  return Object.assign({}, domainState, validate(action.domain))
+  // return Object.assign({}, domainState, validate(action.domain))
+  return {
+    ...domainState,
+    ...validateDomain(action.domain)
+  }
+}
+
+function markNotificationsRead (domainState, action) {
+  return {
+    ...domainState,
+    notifications: domainState.notifications.map(n => ({ ...n, isRead: true }))
+  }
 }
 
 function domain (domainState = initial.domain, action) {
   switch (action.type) {
     case UPDATE_DOMAIN:
       return updateDomain(domainState, action)
+    case MARK_NOTIFICATIONS_READ:
+      return markNotificationsRead(domainState, action)
     default:
       return domainState
   }
diff --git a/src/reducers/ui.js b/src/reducers/ui.js
index 8ead656..5fa405f 100644
--- a/src/reducers/ui.js
+++ b/src/reducers/ui.js
@@ -2,7 +2,7 @@ import initial from '../store/initial.js';
 
 import {
   TOGGLE_FETCHING_DOMAIN,
-  TOGGLE_FETCHING_EVENTS,
+  TOGGLE_FETCHING_SOURCES,
   TOGGLE_VIEW,
   TOGGLE_TIMELINE,
   TOGGLE_INFOPOPUP,
@@ -10,49 +10,45 @@ import {
 } from '../actions'
 
 function toggleFetchingDomain(uiState, action) {
-  return Object.assign({}, uiState, {
-    flags: Object.assign({}, uiState.flags, {
+  return {
+    ...uiState,
+    flags: {
+      ...uiState.flags,
       isFetchingDomain: !uiState.flags.isFetchingDomain
-    })
-  });
+    }
+  }
 }
 
-function toggleFetchingEvents(uiState, action) {
-  return Object.assign({}, uiState, {
-    flags: Object.assign({}, uiState.flags, {
-      isFetchingEvents: !uiState.flags.isFetchingEvents
-    })
-  });
+function toggleFetchingSources(uiState, action) {
+  return {
+    ...uiState,
+    flags: {
+      ...uiState.flags,
+      isFetchingSources: !uiState.flags.isFetchingSources
+    }
+  }
 }
 
 function toggleInfoPopup(uiState, action) {
-  return Object.assign({}, uiState, {
-    flags: Object.assign({}, uiState.flags, {
+  return {
+    ...uiState,
+    flags: {
+      ...uiState.flags,
       isInfopopup: !uiState.flags.isInfopopup
-    })
-  });
-}
-
-function toggleNotifications(uiState, action) {
-  return Object.assign({}, uiState, {
-    flags: Object.assign({}, uiState.flags, {
-      isNotification: !uiState.flags.isNotification
-    })
-  });
+    }
+  }
 }
 
 function ui(uiState = initial.ui, action) {
   switch (action.type) {
     case TOGGLE_FETCHING_DOMAIN:
-      return toggleFetchingDomain(uiState, action);
-    case TOGGLE_FETCHING_EVENTS:
-      return toggleFetchingEvents(uiState, action);
+      return toggleFetchingDomain(uiState, action)
+    case TOGGLE_FETCHING_SOURCES:
+      return toggleFetchingSources(uiState, action)
     case TOGGLE_INFOPOPUP:
-      return toggleInfoPopup(uiState, action);
-    case TOGGLE_NOTIFICATIONS:
-      return toggleNotifications(uiState, action);
+      return toggleInfoPopup(uiState, action)
     default:
-      return uiState;
+      return uiState
   }
 }
 
diff --git a/src/reducers/utils/validators.js b/src/reducers/utils/validators.js
index a995d66..da3e98d 100644
--- a/src/reducers/utils/validators.js
+++ b/src/reducers/utils/validators.js
@@ -52,7 +52,7 @@ function validateTree (node, parent, set, duplicates) {
 /*
 * Validate domain schema
 */
-export function validate(domain) {
+export function validateDomain (domain) {
   const sanitizedDomain = {
     events: [],
     categories: [],
diff --git a/src/store/initial.js b/src/store/initial.js
index 635721e..b675188 100644
--- a/src/store/initial.js
+++ b/src/store/initial.js
@@ -30,8 +30,8 @@ const initial = {
     selected: [],
     filters: {
       timerange: [
-          d3.timeParse("%Y-%m-%dT%H:%M:%S")("2014-08-22T12:00:00"),
-          d3.timeParse("%Y-%m-%dT%H:%M:%S")("2014-08-27T12:00:00")
+          d3.timeParse("%Y-%m-%dT%H:%M:%S")("2013-02-23T12:00:00"),
+          d3.timeParse("%Y-%m-%dT%H:%M:%S")("2016-02-23T12:00:00")
       ],
       tags: [],
       categories: [],
@@ -59,7 +59,7 @@ const initial = {
     {
       label: '3 días',
       duration: 4320,
-      active: true
+      active: false
     },
     {
       label: '12 horas',
@@ -120,7 +120,7 @@ const initial = {
       narratives: {
         default: {
           style: 'dotted',                  // ['dotted', 'solid']
-          opacity: 0.4,                     // range between 0 and 1
+          opacity: 0.9,                     // range between 0 and 1
           stroke: 'red',               // Any hex or rgb code
           strokeWidth: 2
         },
@@ -139,11 +139,10 @@ const initial = {
     },
     flags: {
       isFetchingDomain: false,
-      isFetchingEvents: false,
+      isFetchingSources: false,
 
       isCardstack: true,
-      isInfopopup: false,
-      isNotification: true
+      isInfopopup: false
     },
     tools: {
       formatter: d3.timeFormat("%d %b, %H:%M"),