SQUADRONS of robotic machines have taken flight in recent years, ranging from unmanned aerial vehicles which patrol in Iraq and Afghanistan to experimental machines not much bigger than insects.

近年来，一连串的机器人航空中队前后起飞，包含飞往伊拉克和阿富汗巡逻的无人飞机，和昆虫大小相近的实验型飞行机器。

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In Alaska, in September 2008, the US Coast Guard had just started operations in the Arctic and we joined a C-130 patrol flight to Barrow.

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The review concluded the Customs and Border Patrol had "shortfalls of qualified staff and equipment, " which, together with flight limitations imposed by the Federal Aviation Administration, limited actual flight time.

WSJ: Border-Security Drone Program Off to Rough Start