2007 file photo of a U.S. Air Force MQ-9 Reaper drone.
Ethan Miller/Getty Images
July 5, 2011 China is thought to be moving fastest. Still, the U.S. is expected to account for more than three-quarters of the spending on research and development, and nearly that much of the purchases.
April 21, 2011 The president has approved their use and the first mission was to have been flown today, but was canceled because of poor weather, Pentagon officials say.
FILE - In this Jan. 31, 2010 file photo, a U.S. Predator drone flies over the moon above Kandahar Air Field, southern Afghanistan
September 28, 2010 New reporting on why drone attacks inside Pakistan increased dramatically in September. The US increasing pressure on terrorist safe havens, and a feared terror plot against Europe.
An Israeli army technician walks past the Air Force drone "Heron" at the Palmahim Airbase in central Israel on May 3, 2010.
July 27, 2010 German Luftwaffe pilots are training in Israel to remotely fly drones to be used in Afghanistan.
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