Wastewater and Counterterrorism

This week marks the one year anniversary of the killing of OBL in Abbottabad, Pakistan.  To mark the anniversary, Harvard professor Graham Allison has an excellent article in the current tissue of Time - - How It Went Down. 

One of the ways it went down may have started in a wastewater manhole.  Allison wrote the following in the article:

"A broadsheet of options included everything from surveilling the neighborhood with a miniaturized UAW that resembled a bird (so convincing that one was attacked by an eagle) to analyzing local sewage for genetic markers.  A number of these were pursued successfully and still remain secret."