evidence: The objects did, however, fly at altitudes that could "pose a threat to civilian commercial air traffic," which led Biden to give the order to shoot them down, he said. [...] With a U.S. military pilot’s having shot down a fourth object Sunday afternoon, the White House has not seemed set on its message about what was shot down, who from the government should communicate about it, why there appear to be more unidentified objects, whom they might belong to, what threat they pose or whether decision-making over shooting down such items has changed. [...] After an unidentified object was shot down off northeastern Alaska on Friday, Biden gave a one-word answer to a question from the media — "Success." Canadian Prime Minister Justin Trudeau made Saturday’s shootdown over the Yukon public, although it was a U.S. F-22 that destroyed the object.