[SG, DS] Recon drones

http://www.spacedaily.com/news/uav-00f.html

"A hovering spy craft only 23 centimetres across could soon be flying
behind enemy lines to conduct surveillance, or darting about inside
buildings to help police find hostage-takers.
Micro Craft, an aerospace development company in San Diego,
California, last week successfully tested the miniature vehicle. It
consists of little more than a ducted fan that rotates inside a
protective cylinder."