Andrew Exum digs up a study finding that on "a per capita basis ... twice as many foreign fighters came to Iraq from Libya -- and specifically eastern Libya -- than from any other country in the Arabic-speaking world":
This might explain why those rebels from Libya's eastern provinces are not too excited about U.S. military intervention. It might also give some pause to those in the United States so eager to arm Libya's rebels.
Remember how we armed the anti-Soviet rebels in Afghanistan? We're still fighting some of them.