2. AIR / AFGSC / ICBM 91 / 740 field ☢

AFGSC / 91st Missile Wing 740 Missile Squadron http://upload.wikimedia.org/wikipedia/commons/3/3e/740th_Missile_Squadron.png
Reactivated 1962 as an ICBM squadron assigned to 455th SMW at Minot airbase (ND) Initially with 50x LGM-30B Minuteman I in 1963.
Reassigned 91st Missile Wing in 1968 and upgraded to LGM-30G Minuteman III in 1968/1969. Operational ever since!

740 MS controls and maintains 5 missile alert facitilies (MAF) each with 10 launch facilities.
The squadron consists of missile ops flights, responsible for daily ops, maintenance and security and operation support flights,responsible for ensuring tech readiness of the missile alert facilities

System Replacement!
The current system dates back to the 1960s and USAF missileers often complained of antiquated equipment in their facilities. USAF Global Strike Command completed an analysis of its ground-based systems to find upgrades to improve the exixting system and to implement a follow-on system,
The ground-based strategic deterrent approach is a complete overhaul of the USAF ICBM systems comprising new ground control stations, new C2 systems and replacing the flight system, with new missiles equipped with the current nuclear warheads.
Boeings maintenance contract is expiring 2021 and new plans are coming into view. The Arms Control Association, citing internal USAF documents, reported that the service expects to spend $62.3 billion over 30 years on 642 missiles, 400 of which would be operationally deployed. Ted Kenzie (director of strategic missile and defense systems for Boeing) stated the overall goal of initial operating capability by 2027.

740th Sq Missile Alert Facilities are numbered A-E. Each controlling 10 missiles in their area. The MAF's are at grid:
47°58′00″N 100°34′51″W (#A1) 47°54′31″N 100°55′37″W (#B1) 47°42′52″N 101°00′36″W (#C1)
47°47′42″N 101°17′54″W (#D1) 47°45′02″N 101°40′29″W (#E1)

below http://upload.wikimedia.org/wikipedia/commons/4/4c/Missile_Combat_Crew_on_alert.jpg
launch video http://www.youtube.com/watch?v=qI3K6p4LVc0

Search for 2. AIR / AFGSC / ICBM 91 / 740 field ☢