Arab leaders on Sunday announced a tentative agreement to create a joint military force to combat violence and extremism in the region. "We recognize the clear challenges in the Arab world and the need to take measures to combat them," Nabil al Araby, chairman of the Arab League, said on the final day of the group's summit in Egypt. The announcement came days after a Saudi-led coalition began launching airstrikes in Yemen against the Houthi rebels who have overrun the country and forced President Abd Rabbu Mansour Hadi to flee.  [The Guardian, USA Today]