Holder defended the legality of drone strikes against alleged terrorists. Congressional criticism of drone strikes has been rare. It will also carry a helicopter drone. Bullet casings came from a military drone. The Lockheed D-21 is an American supersonic reconnaissance drone. The article discussed the methods the NSA used to locate targets for lethal drone strikes. It was effectively an armoured suicide drone. Unconfirmed reports suggest the aircraft was hit by fire from a Bayraktar TB2 drone. Outside America there is widespread opposition to US drone killings. One is a discussion of a news article about a U.S. drone strike operation. The terms autonomous drone and UAV are often wrongfully used interchangeably. Further development resulted in the Lockheed D-21 spy drone. It is a spherical array of nine cameras attached to an aerial drone. The flight line and drone runway was crippled. The DJI FPV series are head-mounted displays designed for FPV drone flying.