Eric Walker added "Ground Based Strategic Deterrent (GBSD)" to LGM-35 Sentinel

Eric Walker updated the time prefix for LGM-35 Sentinel to be "2030"

Eric Walker updated the time prefix for LGM-35 Sentinel to be "2023"

Eric Walker added LGM-35 Sentinel to Intercontinental ballsitic missiles (ICBMs)

Eric Walker added Intercontinental ballsitic missiles (ICBMs) to Missiles and rockets