Its possible. But they would have to land anyhow when they run out food and water.Alternative underground command posts were built in Pennsylvania, Colorado, Virginia (two), and West Virginia.
The one in WV was at a really nice resort. The story was that it was chosen to house congress because of its location — about as remote as you can get within a half-day’s drive of DC, but knowing what’s really important to congresscritters, it was probably as much due to the well-trained chefs and waitstaff in place...