By Dan Roberts in Washington, guardian.co.uk, 16 June, 2013
[....] Speaking in a hearing mainly about telephone data collection, the bureau's director, Robert Mueller, said it used drones to aid its investigations in a "very, very minimal way, very seldom".
However, the potential for growing drone use either in the US, or involving US citizens abroad, is an increasingly charged issue in Congress, and the FBI acknowleged there may need to be legal restrictions placed on their use to protect privacy.
"It is still in nascent stages but it is worthy of debate and legislation down the road," said Mueller, in response to questions from Hawaii senator Mazie Hirono.
Hirono said: "I think this is a...