SCIUTTO: Tonight, a new warning in the U.S. war on terror and it's coming straight from the new U.S. secretary of defense. Ashton Carter warning now that al Qaeda in the Arabian Peninsula known as AQAP is exploiting the chaos in Yemen to expand its terror network and threat.</s>ASHTON CARTER, DEFENSE SECRETARY: You see them making great gains on the ground there as they try to take territories, seize territory. And, of course, AQAP is a group that we're very concerned with. We all know that AQAP has the ambition to strike Western targets including the United States.</s>SCIUTTO: U.S. is now increasing its aid to the Saudi-led coalition fighting in Yemen as well. And Friday, a special edition of OUTFRONT. Erin will be live in South Korea with an in-depth interview with Defense Secretary Carter. That is this Friday, live from South Korea. Thank you for joining us tonight. I'm Jim Sciutto. "AC360" now with much more breaking coverage of the South Carolina shooting.
Defense Secy: Al Qaeda "Making Gains" in Yemen.