evidence: Canadian Prime Minister Justin Trudeau said Saturday that an "unidentified object" had been shot down by a US fighter jet over Canadian airspace on his orders. "I ordered the take down of an unidentified object that violated Canadian airspace. @NORADCommand shot down the object over the Yukon. Canadian and U.S. aircraft were scrambled, and a U.S. F-22 successfully fired at the object," Trudeau said on Twitter. [...] It is not clear what the object shot down over Canada is or whether it is related to the spy balloon shot down last week or the unidentified object shot down over Alaska on Friday.