People gather at the site of a drone strike on the road between Yafe and Radfan districts of the southern Yemeni province of Lahj August 11, 2013. Local officials and residents in Yemen’s southern Lahj Province said a drone destroyed a vehicle travelling on a mountain road late on Saturday evening killing its two occupants and bringing to 15 the death toll from four strikes in three days. REUTERS/Stringer (YEMEN)