▁ 1 9 6 0 , ▁the ▁ 5 4 9 th ▁Str ateg ic ▁Miss ile ▁Squadron ▁became ▁the ▁last ▁Atlas - E ▁S MS ▁to ▁be ▁activ ated . ▁The ▁ 5 4 9 th ▁S MS ▁was ▁re - design ated ▁ 5 6 6 th ▁S MS ▁on ▁ 1 ▁July ▁ 1 9 6 1 . ▁That ▁same ▁date ▁the ▁parent ▁ 7 0 6 th ▁Str ateg ic ▁Miss ile ▁Wing ▁stood ▁down . ▁Command ▁respons ib ilities ▁at ▁Warren ▁A FB ▁were ▁assumed ▁by ▁the ▁recently ▁activ ated ▁ 3 8 9 th ▁Str ateg ic ▁Miss ile ▁Wing . ▁ ▁In ▁May ▁ 1 9 6 4 , ▁as ▁the ▁ 5 6 5 th ▁and ▁ 5 6 5 th ▁S MS ▁Atlas - D ▁miss iles ▁were ▁being ▁ph ased ▁out , ▁the ▁ 3 8 9 th ▁Str ateg ic ▁Miss ile ▁Wing ▁received ▁S AC ' s ▁last ▁oper ational ▁read iness ▁ins pection ▁for ▁this ▁system . ▁In ▁September ▁ 1 9 6 4 , ▁S AC ▁in activ ated ▁the ▁ 5 6 4 th ▁S MS . ▁During ▁March ▁ 1 9 6 5 , ▁the ▁ 5 6 6 th ▁S MS ▁Atlas - E ' s ▁would ▁also ▁be ▁de activ ated , ▁comple ting ▁the ▁phase out ▁of ▁the ▁Atlas ▁Miss ile ▁at ▁Warren . ▁▁ 9 0 th ▁Miss ile ▁Wing ▁Min ut eman ▁I , ▁ 1 9 6 3 – 1 9