Wired’s Danger Room broke the Congressional Report Service story earlier this month, calling out some of the most enlightening figures from the 50 pages study (mirrored here). About 31% of US aircraft are unmanned. That represents an amazing change over the past few years as such UAVs only represented 5% of the US total in 2005. Of course, the vast majority of these drone craft are relatively small, able to be launched by hand. The most prolific is the Army’s Raven, with 2200 on order and 1300 delivered. The most widely discussed, and feared, drones are the Predators and Reapers, which can carry heavy ordinance (including hellfire missiles) and are often operated remotely by human pilots stationed in the US. However, CRS reports that there are only about 160 Predator and Reapers in service.