ANDREA SHALAL, STEVE HOLLAND and PHIL STEWART A U.S. F-22 fighter jet shot down an unidentified object flying high over Alaska, U.S. officials said, less than a week after the military brought down a Chinese balloon that had flown across the United States. A Sidewinder missile downed the latest craft, which was about the size of a small car, said U.S. Brig. Gen. Patrick Ryder, the Pentagon's chief spokesperson. "We don't know who owns this object," said White House spokesperson John Kirby, adding that it was unclear where it began its flight. President Joe Biden ordered the shootdown, which was…