Very interesting that an RQ-4 Global Hawk was lost last June and the USAF is only now acknowledging it. They have been up front about all the other crashes. Seems that this may have been a trial run for all the other attacks on manned aircraft in the last year.

http://www.thedrive.com/the-war-zone/23383/exclusive-u-s-air-force-rq-4-global-hawk-drone-crashed-off-spain-last-june