DUBAI, United Arab Emirates (AP) — In Libya, militias armed with shoulder-launched missiles are battling for control of the country’s main airport. In Africa, the entire Sahel region is awash with weapons that include portable air defense systems leftover from the ouster of Moammar Gadhafi.

Then there’s Syria’s civil war, in which thousands of soldiers have defected and set up new battalions that have shot down military helicopters and jets. And in Iraq, the al-Qaida breakaway group that has taken huge swaths of territory seized weapons depots all along the way.