The U.S. military shot down what it's calling a "high altitude object" on Sunday over Lake Huron, just hours after airspace was closed over Lake Michigan. On Sunday night, Department of Defense officials held a briefing to speak about their decision to shoot down the object over the lake. It's the latest in a string of similar sightings and take-downs. The first happened two weeks ago when officials say a suspected Chinese spy balloon crossed into U.S. airspace and was later downed by a U.S. fighter jet.