Malaysian Airlines flight #MH17 (https://twitter.com/hashtag/MH17?src=hash) reported to have been shot down by BUK-M1 [aka SA-11] surface-to-air missile system pic.twitter.com/UWwFifWhZr (http://t.co/UWwFifWhZr)

— NATOSource (@NATOSource) July 17, 2014 (https://twitter.com/NATOSource/statuses/489804662816903168)

Needless to add, advanced mobile air defense systems like the Buk/SA-11 are not in the inventory of most "rebel groups" in the world.

— John Schindler (@20committee) July 17, 2014 (https://twitter.com/20committee/statuses/489798248581046272)