The military's reliance on unmanned aircraft that can watch, hunt and sometimes kill insurgents has soared to more than 500,000 hours in the air, largely in Iraq, The Associated Press has learned. And new Defense Department figures obtained by The AP show that the Air Force more than doubled its monthly use of drones between January and October, forcing it to take pilots out of the air and shift them to remote flying duty to meet part of the demand. The dramatic increase in the development and use of drones across the armed services reflects what will be an even more aggressive effort over the next 25 years, according to the new report. Pentagon officials said that even as troops begin to slowly come home this year, the use of Predators, Global Hawks, Shadows and Ravens will not likely slow. I think right now the demand for the capability that the unmanned system provides is only increasing," said Army Col. Bob Quackenbush, deputy director for Army Aviation. "Even as the surge ends, I suspect the deployment of the unmanned systems will not go down, particularly for larger systems." About 120 Air Force pilots were recently transferred to staff the drones to keep pace with demands, the Air Force said. Some National Guard members were also called up to staff the flights. And more will be doing that in the coming months, as the Air Force adds bases where pilots can remotely fly the aircraft. One key reason for the increase is that U.S. forces in Iraq grew from 15 combat brigades to 20 over the spring and early summer, boosting troop totals from roughly 135,000 to more than 165,000. Slowly over the next six months, five brigades are being pulled out of Iraq that will not be replaced, as part of a drawdown announced by the administration. The increased military operations all across Iraq last summer triggered greater use of the drones and an escalating call for more of the systems.

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