US still using drones like one downed in Iran

WASHINGTON - The US Air Force understands what caused the crash of one of its unmanned spy drones over Iran late last year and continues to use that type of drone, Air Force Chief of Staff General Norton Schwartz said.
Schwartz, in an interview with Reuters this week, said the drones are providing intelligence, surveillance and reconnaissance (ISR) data to military commanders.
US officials reject Iran's claim that it brought down the stealthy RQ-170 Sentinel built by Lockheed Martin Corp, but remain tight-lipped about what caused the crash.
US officials told Reuters last month that they were investigating a combination of pilot error and technical malfunction as possible causes.