Whats going to be said when the first commercial airliner is downed by one the lost Man-Pads?
Sorry, that cat is rrrrrrrr outta the bag on that one.
http://en.wikipedia.org/wiki/Man-portable_air-defense_systems
MANPADS are all over already for decades, you can probably buy them on the street in Istanbul. Everyone knows for a long time now that U.S. and their NGOs are supporting the Syrian rebels and the Russians and their NGOs are supporting Assad.
Kaddafi's stockpiles were raided, of course, that happened many moons ago. Everyone knows weapons were going to Syria via Turkey, which still functions as a crossroads after thousands of years.
IMHO, the meeting with the Turkish foreign minister was simply the bait in the kidnap trap for poor Ambassador Stevens. If NGOs set this up, neither Stevens nor the Turk would know about the trap, so there would be no possibility of the Turk tipping him off.