b'If you looked across the tarmac at the Great Falls, Montana airport in April, you likely would have been surprised to see a fully marked Russian Air Force jet parked nearby. Its mission that week would have been even more puzzling: The unarmed Tupolev Tu-154Mspent four days flying over some of the most sensitive military bases in the United States, including the complex in the Nevada desert known as \\u201cArea 51.\\nLearn more about your ad choices. Visit podcastchoices.com/adchoices'