Islamic militants have shot down an Egyptian army helicopter with a heat seeking shoulder-fired missile:
http://www.bbc.co.uk/news/world-middle-east-25915607
The BBC article seems to express „grief“ about this. Probably because the Egyptian regime (and army) is considered pro-western.

Interestingly western press reports of the Syrian rebels´ successes in shooting down Syrian army Migs and helicopters and killing hundreds of personell have been accompanied enthusiasm and joy.
Note: If you are a radical sectarian Islamist fighting a pro-Iranian or pro-Russian state you are good, you are probably a „freedom fighter“ and the US congress will somehow find a way to declare you „moderate“.
If you are however fighting a pro-western state you are a terrorist and one has to be worried if you have acquired and applied deadly weapons.