Thanks Ken,
One minute 30 second BBC video news clip here, including sound bite by Dr. Parcack -
http://www.bbc.co.uk/news/world-africa-13552329
And a BBC text news story here -
http://www.bbc.co.uk/news/world-13522957
... including a one minute video clip from the documentary.
This clip highlights where outlines of where streets and buildings once were
can be seen in the infrared imagery.