An Air Force cargo aircraft collided with a drone in Afghanistan, a potentially serious mishap that underscores how crowded the skies can be over the combat zone.

Air Force Capt. Justin Brockhoff, a spokesman for the military in Afghanistan, confirmed that the C-130 cargo plane was forced to make an emergency landing Monday at a forward operating base in eastern Afghanistan after colliding with an RQ-7 Shadow, an unmanned aerial vehicle that is usually operated by the Army and the Marine Corps.

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