>>17657364DEN is just the entrance and reception area for lucky 144,000.
The Front Range is also the home of the Cheyenne Mountain Complex, which according to Wikipedia houses all of the following:
Air Defense Command satellite systems
Ballistic Missile Defense Center
Combat Operations Center
Space Defense Operations Center
Joint Surveillance System
Survivable Communications Integration System
NORAD
It is also notable that the CIA is rumored to have recently moved their headquarters from Langley, Virginia to Denver, Colorado.
