The "L" in LGM is the Department of Defense designation for silo-launched; "G" means surface attack; "M" stands for guided missile, the 30 stands for ... to an underground launch control center ...

Meanwhile, the United States is still reliant on its old, 50-year-old LGM-30 Minuteman missiles ... and what's known as a cold launch. This entails the missile not launching directly from the silo but ...