diff --git a/package.json b/package.json
index b4a1c53..c5d556e 100644
--- a/package.json
+++ b/package.json
@@ -16,6 +16,7 @@
     "es6-promise": "^4.1.1",
     "joi": "^14.0.1",
     "leaflet": "^1.0.3",
+    "marked": "^0.6.0",
     "normalizr": "^3.2.3",
     "object-hash": "^1.3.0",
     "react": "^16.6.3",
diff --git a/src/components/Dashboard.jsx b/src/components/Dashboard.jsx
index d734de0..066cffd 100644
--- a/src/components/Dashboard.jsx
+++ b/src/components/Dashboard.jsx
@@ -154,6 +154,16 @@ function mapDispatchToProps(dispatch) {
   };
 }
 
+function injectSource(id) {
+  return state => ({
+    ...state,
+    app: {
+      ...state.app,
+      source: state.domain.sources[id]
+    }
+  })
+}
+
 export default connect(
   state => state,
   mapDispatchToProps,
diff --git a/src/components/Md.jsx b/src/components/Md.jsx
new file mode 100644
index 0000000..2510359
--- /dev/null
+++ b/src/components/Md.jsx
@@ -0,0 +1,41 @@
+import React  from 'react'
+import PropTypes from 'prop-types'
+import marked from 'marked'
+
+class Md extends React.Component {
+  constructor(props) {
+    super(props)
+    this.state = { md: null, error: null }
+  }
+
+  componentDidMount() {
+    fetch(this.props.path)
+      .then(resp => resp.text())
+      .then(text => {
+        this.setState({ md: marked(text) })
+      })
+      .catch(err => {
+        this.setState({ error: true })
+      })
+  }
+
+  render() {
+    if (this.state.md && !this.state.error) {
+      return (
+        <div dangerouslySetInnerHTML={{ __html: this.state.md }} />
+      )
+    } else if (this.state.error) {
+      return this.props.unloader || <div>Error: couldn't load source</div>
+    } else {
+      return this.props.loader
+    }
+  }
+}
+
+Md.propTypes = {
+  loader: PropTypes.func,
+  unloader: PropTypes.func,
+  path: PropTypes.string.isRequired
+}
+
+export default Md
diff --git a/src/components/SourceOverlay.jsx b/src/components/SourceOverlay.jsx
index 8f6da4e..452eebf 100644
--- a/src/components/SourceOverlay.jsx
+++ b/src/components/SourceOverlay.jsx
@@ -1,122 +1,159 @@
 import React from 'react'
 import Img from 'react-image'
 import { Player } from 'video-react'
+import Md from './Md.jsx'
 import Spinner from './presentational/Spinner'
 import NoSource from './presentational/NoSource'
+// TODO: move render functions into presentational components
 
-class SourceOverlay extends React.Component {
-  constructor(props) {
-    super(props)
-    this.renderVideo = this.renderVideo.bind(this)
-    this.renderPhoto = this.renderPhoto.bind(this)
-    this.renderPhotobook = this.renderPhotobook.bind(this)
-    this.renderTestimony = this.renderTestimony.bind(this)
+function SourceOverlay ({ source, onCancel }) {
+  function renderImage(path) {
+    return (
+      <div className='source-image-container'>
+        <Img
+          className='source-image'
+          src={path}
+          loader={<Spinner />}
+          unloader={<NoSource failedUrls={source.paths} />}
+        />
+      </div>
+    )
   }
 
-  renderVideo() {
+  function renderVideo(path) {
     // NB: assume only one video
     return (
       <div className="media-player">
         <Player
           className='source-video'
           playsInline
-          src={this.props.source.paths[0]}
+          src={path}
         />
       </div>
     )
   }
 
-  renderPhoto() {
+  function renderText(path) {
     return (
-      <div className='source-image-container'>
-        <Img
-          className='source-image'
-          src={this.props.source.paths}
+      <div className='source-text-container'>
+        <Md
+          path={path}
           loader={<Spinner />}
-          unloader={<NoSource failedUrls={this.props.source.paths} />}
+          unloader={renderError()}
         />
       </div>
     )
   }
 
-  renderPhotobook() {
-    return (
-      <div className='source-image-container'>
-        {this.props.source.paths.map((url, idx) => (
-          <Img
-            key={idx}
-            className='source-image'
-            src={url}
-            loader={<Spinner />}
-            unloader={<NoSource failedUrls={[this.props.source.path]} />}
-          />
-
-        ))}
-      </div>
-    )
-  }
-
-  renderError() {
+  function renderError() {
     return (
       <NoSource failedUrls={["NOT ALL SOURCES AVAILABLE IN APPLICATION YET"]} />
     )
   }
 
-  renderTestimony() {
+  function renderNoSupport(ext) {
+    return (
+      <NoSource failedUrls={[`Application does not support extension: ${ext}`]} />
+    )
+  }
+
+  function toMedia(path) {
+    let type;
+    switch (true) {
+      case /\.(png|jpg)$/.test(path):
+        type = 'Image'; break
+      case /\.(mp4)$/.test(path):
+        type = 'Video'; break
+      case /\.(md)$/.test(path):
+        type = 'Text'; break
+      default:
+        type = 'Unknown'; break
+    }
+    return { type, path }
+  }
+
+  function getTypeCounts(media) {
+    let counts = { Image: 0, Video: 0, Text: 0 }
+    media.forEach(m => {
+      counts[m.type] += 1
+    })
+    return counts
+  }
+
+  function _renderPath(media) {
+    const { path, type } = media
+    switch (type) {
+      case 'Image':
+        return renderImage(path)
+      case 'Video':
+        return renderVideo(path)
+      case 'Text':
+        return renderText(path)
+      default:
+        return renderNoSupport(path.split('.')[1])
+    }
+  }
+
+  function _renderCounts(counts) {
+    const strFor = type =>
+    counts[type] > 0 ?
+      `${counts[type]} ${type.toLowerCase()}${counts[type] > 1 ? 's': ''}`
+      : ''
+    const img = strFor('Image')
+    const vid = strFor('Video')
+    const txt = strFor('Text')
+
     return (
       <div>
-        <a href={`${this.props.source.path}.docx`}>Download Testimony</a>
+        {img ? img : ''}
+        {vid ? `, ${vid}`: ''}
+        {txt ? `, ${txt}`: ''}
       </div>
     )
   }
 
-  _renderSwitch() {
-    switch(this.props.source.type) {
-      case 'Video':
-        return this.renderVideo()
-      case 'Photo':
-        return this.renderPhoto()
-      case 'Photobook':
-        return this.renderPhotobook()
-      case 'Eyewitness Testimony':
-        return this.renderTestimony()
-      default:
-        return this.renderError()
-    }
+  function _renderContent(media) {
+    return (
+      <React.Fragment>
+        {media.map(_renderPath)}
+      </React.Fragment>
+    )
   }
 
-  render() {
-    if (typeof(this.props.source) !== 'object') {
-      return this.renderError()
-    }
-    const {id, url, title, date, type, affil_1, affil_2} = this.props.source
-    return (
-      <div className="mo-overlay">
-        <div className="mo-container">
-          <div className="mo-header">
-            <div className="mo-header-close" onClick={this.props.onCancel}>
-              <button className="side-menu-burg is-active"><span></span></button>
-            </div>
-            <div className="mo-header-text">{this.props.source.id}</div>
+  if (typeof(source) !== 'object') {
+    return renderError()
+  }
+  const {id, url, title, paths, date, type, desc} = source
+  const media = paths.map(toMedia)
+  const counts = getTypeCounts(media)
+
+
+  return (
+    <div className="mo-overlay">
+      <div className="mo-container">
+        <div className="mo-header">
+          <div className="mo-header-close" onClick={onCancel}>
+            <button className="side-menu-burg is-active"><span></span></button>
           </div>
-          <div className="mo-media-container">
-            {this._renderSwitch()}
-          </div>
-          <div className="mo-meta-container">
-            <div className="mo-box">
-              {id ? <div><b>{id}</b></div> : null}
-              {title? <div><b>{title}</b></div> : null}
-              <hr/>
-              {type ? <div>Type: <span className="indent">{type}</span></div> : null}
-              {date ? <div>Date:<span className="indent">{date}</span></div> : null}
-              <hr/>
-              {url ? <div><a href={url} target="_blank">Link to original URL</a></div> : null}
-            </div>
+          <div className="mo-header-text">{source.title}</div>
+        </div>
+        <div className="mo-media-container">
+          {_renderContent(media)}
+        </div>
+        <div className="mo-meta-container">
+          <div className="mo-box">
+            {title? <div><b>{title}</b></div> : null}
+            <div>{_renderCounts(counts)}</div>
+            {type ? <div>{type}</div> : null}
+            {date ? <div>Date:<span className="indent">{date}</span></div> : null}
+            {url ? <div><a href={url} target="_blank">Link to original URL</a></div> : null}
+            <hr />
+            {desc ? <div>{desc}</div> : null}
           </div>
         </div>
       </div>
-    )
-  }
+    </div>
+  )
 }
 
 export default SourceOverlay
diff --git a/src/components/presentational/CardSource.js b/src/components/presentational/CardSource.js
index 9eab0af..9b3da5b 100644
--- a/src/components/presentational/CardSource.js
+++ b/src/components/presentational/CardSource.js
@@ -35,15 +35,20 @@ const CardSource = ({ source, isLoading, onClickHandler }) => {
     )
   }
 
+  const isImgUrl = /\.(jpg|png)$/
   let thumbnail = source.thumbnail
-  if (!thumbnail || thumbnail === '') {
+
+  if (!thumbnail || thumbnail === '' || !thumbnail.match(isImgUrl)) {
     // default to first image in paths, null if no images
-    const imgs = source.paths.filter(p => p.match(/\.(jpg|png)$/))
+    const imgs = source.paths.filter(p => p.match(isImgUrl))
     thumbnail = imgs.length > 0 ? imgs[0] : null
   }
 
-  console.log(!!thumbnail)
-  console.log(thumbnail)
+  const fallbackIcon = (
+    <i className="material-icons source-icon">
+      {renderIconText(source.type)}
+    </i>
+  )
 
   return (
     <div className="card-source">
@@ -52,12 +57,15 @@ const CardSource = ({ source, isLoading, onClickHandler }) => {
           : (
             <div className="source-row" onClick={() => onClickHandler(source)}>
               {!!thumbnail ? (
-                <img className="source-icon" src={thumbnail} width={30} height={30} />
-              ) : (
-                <i className="material-icons source-icon">
-                  {renderIconText(source.type)}
-                </i>
-              )}
+                <Img
+                  className="source-icon"
+                  src={thumbnail}
+                  loader={<Spinner small />}
+                  unloader={fallbackIcon}
+                  width={30}
+                  height={30}
+                />
+              ) : fallbackIcon}
              <p>{source.id}</p>
             </div>
           )}
diff --git a/src/components/presentational/Spinner.js b/src/components/presentational/Spinner.js
index 062bd83..f3c483c 100644
--- a/src/components/presentational/Spinner.js
+++ b/src/components/presentational/Spinner.js
@@ -1,8 +1,8 @@
 import React from 'react';
 
-const Spinner = () => {
+const Spinner = ({ small }) => {
   return (
-    <div className="spinner">
+    <div className={`spinner ${small ? 'small' : ''}`}>
       <div className="double-bounce-overlay"></div>
       <div className="double-bounce"></div>
     </div>
diff --git a/src/js/utilities.js b/src/js/utilities.js
index e9692e2..4ba3755 100644
--- a/src/js/utilities.js
+++ b/src/js/utilities.js
@@ -72,3 +72,18 @@ export function formatterWithYear(datetime) {
 export function formatter(datetime) {
   return d3.timeFormat("%d %b, %H:%M")(datetime);
 }
+
+/**
+ * Debugging function: put in place of a mapStateToProps function to
+ * view that source modal by default
+ */
+function injectSource(id) {
+  return state => ({
+    ...state,
+    app: {
+      ...state.app,
+      source: state.domain.sources[id]
+    }
+  })
+}
+
diff --git a/src/reducers/schema/sourceSchema.js b/src/reducers/schema/sourceSchema.js
index c465ba5..1b61ac0 100644
--- a/src/reducers/schema/sourceSchema.js
+++ b/src/reducers/schema/sourceSchema.js
@@ -2,11 +2,12 @@ import Joi from 'joi';
 
 const sourceSchema = Joi.object().keys({
   id:             Joi.string().required(),
+  title:          Joi.string().allow(''),
   thumbnail:      Joi.string().allow(''),
   paths:          Joi.array().required(),
   type:           Joi.string().allow(''),
-  affil_1:        Joi.string().allow(''),
-  affil_2:        Joi.string().allow(''),
+  // affil_1:        Joi.string().allow(''),
+  // affil_2:        Joi.string().allow(''),
   url:            Joi.string().allow(''),
   desc:          Joi.string().allow(''),
   parent:         Joi.string().allow(''),
diff --git a/src/scss/loading.scss b/src/scss/loading.scss
index 1fdcff6..063c622 100644
--- a/src/scss/loading.scss
+++ b/src/scss/loading.scss
@@ -42,6 +42,12 @@ https://github.com/tobiasahlin/SpinKit/blob/master/LICENSE
 
   position: relative;
   margin: 10px auto;
+
+  &.small {
+    width: 15px;
+    height: 15px;
+    margin: 5px 20px 5px 10px;
+  }
 }
 
 .double-bounce, .double-bounce-overlay {
diff --git a/src/scss/mediaoverlay.scss b/src/scss/mediaoverlay.scss
index 9046ba7..ae72493 100644
--- a/src/scss/mediaoverlay.scss
+++ b/src/scss/mediaoverlay.scss
@@ -48,34 +48,46 @@ $header-inset: 10px;
 
 .mo-container {
   background-color: rgba(239, 239, 239, 0.9);
-  max-width: $panel-width;
-  min-width: $panel-width;
-  max-height: $panel-height;
-  min-height: $panel-height;
+  // max-width: $panel-width;
+  // min-width: $panel-width;
+  // max-height: $panel-height;
+  // min-height: $panel-height;
   display: flex;
   flex-direction: column;
-  justify-content: flex-start;
   align-items: center;
+  height: 80vh;
+  max-width: 90vw;
+  box-shadow: 0 19px 19px rgba(0, 0, 0, 0.3), 0 15px 12px rgba(0, 0, 0, 0.22);
 
   .mo-media-container {
     flex: 1;
     display: flex;
+    flex-direction: column;
     justify-content: center;
     align-items: center;
   }
 }
 
 .mo-media-container {
-  // padding-top: 3*$header-inset;
   font-family: "Lato", Helvetica, sans-serif;
-  // max-height: $vimeo-height;
   min-width: 100%;
-  max-height: 500px;
+  max-height: 60vh;
+  overflow-y: auto;
 
   .media-player {
     width: 100%;
     max-width: $vimeo-width;
   }
+
+  .media-content {
+    display: flex;
+    flex-direction: column;
+  }
+
+  // NB: topcushion seems to be necessary with certain overflows..
+  &.topcushion {
+    padding-top: 150px;
+  }
 }
 
 .mo-meta-container {
@@ -144,16 +156,17 @@ $header-inset: 10px;
   }
 }
 
-.source-image-container {
-  padding: 0 25px;
-  overflow-y: scroll;
-  height: 100%;
+.source-image-container, .source-text-container {
+  padding: 0 10em;
+  display: flex;
+  justify-content: center;
+  align-items: center;
 }
 
 .source-image, .source-video {
   max-width: calc(100% - 20px);
   max-height: 350px !important;
-  height: 100%;
+  // height: 100%;
   padding: 10px;
 }
 
diff --git a/yarn.lock b/yarn.lock
index a455221..9f5e536 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -3962,7 +3962,6 @@ lodash.tail@^4.1.1:
 lodash.throttle@^4.1.1:
   version "4.1.1"
   resolved "https://registry.yarnpkg.com/lodash.throttle/-/lodash.throttle-4.1.1.tgz#c23e91b710242ac70c37f1e1cda9274cc39bf2f4"
-  integrity sha1-wj6RtxAkKscMN/HhzaknTMOb8vQ=
 
 lodash@^4.0.0, lodash@^4.17.10, lodash@^4.17.3, lodash@^4.17.5, lodash@^4.2.0, lodash@^4.2.1, lodash@~4.17.10:
   version "4.17.11"
@@ -4036,6 +4035,10 @@ map-visit@^1.0.0:
   dependencies:
     object-visit "^1.0.0"
 
+marked@^0.6.0:
+  version "0.6.0"
+  resolved "https://registry.yarnpkg.com/marked/-/marked-0.6.0.tgz#a18d01cfdcf8d15c3c455b71c8329e5e0f01faa1"
+
 matcher@^1.1.1:
   version "1.1.1"
   resolved "https://registry.yarnpkg.com/matcher/-/matcher-1.1.1.tgz#51d8301e138f840982b338b116bb0c09af62c1c2"
@@ -5244,7 +5247,6 @@ redux@^3.6.0:
 redux@^4.0.0:
   version "4.0.1"
   resolved "https://registry.yarnpkg.com/redux/-/redux-4.0.1.tgz#436cae6cc40fbe4727689d7c8fae44808f1bfef5"
-  integrity sha512-R7bAtSkk7nY6O/OYMVR9RiBI+XghjF9rlbl5806HJbQph0LJVHZrU5oaO4q70eUKiqMRqm4y07KLTlMZ2BlVmg==
   dependencies:
     loose-envify "^1.4.0"
     symbol-observable "^1.2.0"
@@ -6403,7 +6405,6 @@ verror@1.10.0:
 video-react@^0.13.1:
   version "0.13.1"
   resolved "https://registry.yarnpkg.com/video-react/-/video-react-0.13.1.tgz#5d0dc68748f9b12e118beea1998d6ae5f6cbd6ba"
-  integrity sha512-AeGSpddfHv0UxeJztWUALYEjCdzXM1QdtQ5GD1VUd3vxcgwgIfB7EzFKcewRevSHHK8TDmjNksbvbWRobF/QeA==
   dependencies:
     classnames "^2.2.3"
     lodash.throttle "^4.1.1"