A U.S. fighter jet on Sunday shot down an unidentified object flying over Lake Huron in Michigan on the orders of President Joe Biden, the Defense Department said, citing a potential hazard to civil aviation.It was the fourth flying object downed by the U.S. military over North American airspace this month. The stepped-up air defense activity began when a suspected Chinese balloon started traversing the continental United States late last month. It was shot down on Feb. 4 off the coast of South Carolina.It is also the third day in a row that the U.S. military has shot down an unidentified o…READ FULL ARTICLE