evidence: On Saturday, an unidentified object was downed over northern Canada, a day after another object had been shot down over Alaska airspace by a U.S. F-22. Last weekend, a Chinese surveillance balloon was taken down by F-22s off the coast of South Carolina. [...] The unidentified object that was shot down in Canadian airspace had been tracked since Friday evening, according to a statement from Pentagon spokesman Brig. Gen. Patrick Ryder. [...] U.S. President Joe Biden and Canadian Prime Minister Justin Trudeau both approved the shoot-down on Saturday, according to a statement from the White House.