paid out tens of thousands of dollars to victims of drone strikes using U.S.-supplied funds, a source close to Yemen's presidency said, echoing accounts by legal sources and a family that lost two members in a 2012 raid. REUTERS/Khaled Abdullah (YEMEN - Tags: CIVIL UNREST MILITARY POLITICS SOCIETY TPX IMAGES OF THE DAY)

Various U.S. military drones are seen at the Smithsonian National Air and Space Museum in Washington September 1, 2015. REUTERS/Gary Cameron

The Navmar Applied Sciences Corp. TigerShark is escorted off the runway after landing during "Black Dart", a live-fly, live fire demonstration of 55 unmanned aerial vehicles, or drones, at Naval Base Ventura County Sea Range, Point Mugu, near Oxnard, California July 31, 2015. REUTERS/Patrick T. Fallon

Soldiers stand behind of a camera by Unmanned Aerial System 'Shadow'during an official presentation by the German and U.S. Unmanned Aerial Systems (UAS) at the U.S. military base in Vilseck-Grafenwoehr October 8, 2013. The drone has a wing-spread of 6.90 metre, an aircraft speed of about 177 km/h and it's mainly used in Afghanistan. Picture taken October 8. REUTERS/Michaela Rehle (GERMANYMILITARY - Tags: POLITICS) MILITARY)

People gather near the wreckage of a car destroyed by a U.S. drone air strike that targeted suspected al Qaeda militants in August 2012, in the al-Qatn district of the southeastern Yemeni province of Hadhramout February 5, 2013. U.S. drones have launched almost daily raids on suspected al Qaeda militants in Yemen during the past two weeks, and air strikes have aggravated discontent among Yemenis, who say the strikes pose a threat to civilians.