Mueller: FBI uses drones but very seldom

photo FBI Director Robert Mueller testifies on Capitol Hill in Washington today before the Senate Judiciary Committee hearing on national security matters. As Mueller nears the end of his 12 years as head of the law enforcement agency, lawmakers questioned him about the IRS, surveillance activities, and the Boston Marathon bombing. (AP Photo/J. Scott Applewhite)

WASHINGTON (AP) - FBI Director Robert Mueller (MULL-er) says the law enforcement agency uses drones for surveillance but does so rarely.

In an appearance before the Senate Judiciary Committee, Mueller says the bureau is developing guidelines for drones and that the privacy implications of using drones are, in Mueller's words, worthy of debate and legislation down the road.

The aerospace industry forecasts a worldwide deployment of almost 30,000 drones by 2018, with the United States accounting for half of them.

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