Keep going past White Sands National Monument and you'll enter White Sands Missile Range. If there is a missile test on the schedule, the White Sands Police will block the road, pull everyone into a layby, and even give you a countdown to the launch so that you can watch in awe. On the western side of the Missile Range, just before going over the mountain pass towards Las Cruces, is the Headquarters. It is well worth the short detour to go to the White Sands Missile Range Museum. Located just inside the Army post's gate, there is a large outdoor display of dozens of missiles, a V-2 inside an enclosed building, and a great museum with more missiles, historical displays of various types of communication and radar devices, themed rooms reflecting New Mexico's history with Native Americans, space travel, missile testing, and of course the site of the first atomic bomb - Trinity. If you're not military affiliated with a valid ID card, you must leave the post when you're done at the museum. Visitors are not allowed on the rest of the military installation.