[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."