evidence: It was the fourth flying object to be shot down over North America by a U.S. missile in a little more than a week. [...] On President Joe Biden's order, a U.S. F-16 fighter shot down the object at 2:42 p.m. local time over Lake Huron on the U.S.-Canada border, Pentagon spokesperson Patrick Ryder said in an official statement. [...] U.S. officials identified the first object as a Chinese surveillance balloon and shot it down off the coast of South Carolina on Feb. 4. On Friday, a second object was shot down over sea ice near Deadhorse, Alaska. And a third object was destroyed over Canada's Yukon on Saturday, with investigators still hunting for the wreckage.