Alert Apron of the former Glasgow Air Force Base, Montana, United States, circa 1957 to 1968. Informally called the "Christmas tree" because of its branch-like pads. B-52 bombers are shown approximately to scale. In the lower right is the partly subterranean "Readiness Crew Building" informally called the "Mole Hole".  Illustration made with CorelDraw and Corel PhotoPaint.
<a href="//commons.wikimedia.org/wiki/User:Truthdowser" title="User:Truthdowser">Truthdowser</a>
<span class="int-own-work" lang="en">Own work</span>