Drones "are under consideration, " the defense officials said, though the military's stash of unmanned aerial vehicles is in heavy demand.

CNN: January 16, 2013 -- Updated 1835 GMT (0235 HKT)

Drones "are under consideration, " according to defense officials, though the military's stash of unmanned aerial vehicles are in heavy demand.

CNN: STORY HIGHLIGHTS

In 2001, the military had just a few Unmanned Aerial Vehicles (U.A.V.s).

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Its pilot line in California will supply solar cells for unmanned aerial vehicles (UAVs) used by the military.

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