A US Air Force spy jet has been spotted circling Russia’s western exclave of Kaliningrad, which borders Poland, as tensions soar between NATO and Moscow. Flight tracking data appears to show an American RC-135U aircraft taking off from the UK early on Tuesday, flying over the Baltic states before looping around Kaliningrad during a 7-hour round trip. JOIN US ON TELEGRAM Follow our coverage of the war on the @Kyivpost_official . This type of aircraft is specifically designed to collect