It would appear that, despite the screeching of the anti-gun bigots here, the U.S. doesn't have the most lax or ignored gun laws.  Yemen seems to enjoy a bit more freedom in that regard.

"I have cannons, missiles, Kalashnikovs, anti-aircraft guns and hand grenades," said community leader Mohammed Naji, sitting cross-legged in his house in the Yemeni capital, Sana'a. "This is a part of our culture, and a tribesman can give up everything except his gun."

...

The report said it was relatively easy to obtain surface-to-air missiles in Yemen.

Too bad their culture is so messed up in other ways.  Revenge killings are just a bit too crude for my tastes.