The Pentagon has been launching drone strikes on first responders…to other drone strikes.

"NYU student Josh Begley is tweeting every reported U.S. drone strike since 2002, and the feed highlights a disturbing tactic employed by the U.S. that is widely considered a war crime.

Known as the "double tap," the tactic involves bombing a target multiple times in relatively quick succession, meaning that the second strike often hits first responders."

http://www.businessinsider.com/us-drone-tweets-reveal-double-tap-plan-2012-12