 On 16 December 2010, an Israeli F-16I shot down an unmanned "balloon" that had violated restricted airspace over Israel's Negev Nuclear Research Centre.It is widely believed that this center is where Israel's arsenal of nuclear weapons is produced.On 6 October 2012, an Israeli F-16I, serial 844, shot down an unmanned aerial vehicle over southern Israel using two Python-5 missiles, the first one missing the target.