Missile Town

Tucson, Arizona was once home to 18 ballistic missiles which were capable of flying across entire continents. Each one was 10 feet wide and 110 feet long. They could destroy an area of up to 900 square miles and were capable of being launched in only 58 seconds.
Each missile had a 9-megaton nuclear warhead at its tip. Obviously, the project was kept secret, but the question now is whether some of the missiles were left behind.