9. ICBM Ellsworth 44 / 66 field

Former 44 Operations Group / 66 Missile Sq Minuteman ICBM field
66th Sq activated in 1962 as a SAC ICBM missile squadron, trained with the 850th SMS in Titan I ops but made operational with LGM-30B Minuteman I missiles in 1963 and upgraded to LGM-30F Minuteman II in 1972. Remained on Cold War nuclear alert until in response to President Bush's directive to stand down the Minuteman II system.
Dissipated launch codes and pin safety control switches were at 15 launch control facilities below.
Deactivation of the entire missile complex ended in the summer of 1993; squadron deactivated 1993.
http://upload.wikimedia.org/wikipedia/commons/0/0a/66th_Missile_Squadron.PNG
Minuteman II missile system http://missilethreat.csis.org/missile/minuteman-ii/

Former Missile Alert Facilities (A-E flights, each controlling 10 missiles) located at grid:
A-01 19.9 mi S of Howes, SD, 44°19′52″N 102°03′03″W
B-01 7.5 mi NxNW of Wall SD, 44°05′56″N 102°17′01″W
C-01 10.1 mi N of Philip SD, 44°11′01″N 101°42′09″W
D-01 6.7 mi SxSW of Cottonwood SD, 43°52′40″N 101°57′42″W
E-01 6.3 mi NxNE of Kadoka SD, 43°55′12″N 101°28′52W

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