The Pentagon says a fighter jet shot down a “high-altitude object” over Alaska that appeared to be unmanned. The object was flying at an altitude of 40,000 feet and was the “size of a small car” but a U.S. official says it didn’t seem to have any surveillance equipment. Former Defense Secretary William Cohen tells Anderson Cooper he thinks the President wanted to send a message of, “if you invade our airspace, we’re going to take it out.” Plus, CNN Chief International Security Correspondent Nick Paton Walsh joins AC360 from Antakya, Turkey, where search and rescue teams are still looking for survivors of the 7.8 magnitude earthquake that’s killed more than 23,000 people.

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