Yemen trained….
Check it out:

Al-Qaida in the Arabian Peninsula directed the attack against the French satirical magazine Charlie Hebdo in Paris “as revenge for the honor” of Islam’s Prophet Muhammad, a member of the group told The Associated Press on Friday.

At least one of the two brothers involved in the attack travelled to Yemen in 2011 and either received training from or fought alongside the group, according to U.S. and Yemeni officials. A U.S. intelligence assessment described to the AP shows that Said Kouachi was trained in preparation to return home and carry out an attack.