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 the Minuteman series of missile and the G ...

The LGM-30 Minuteman has been on high alert for over 60 years, ready to launch at any moment. But with hypersonic weapons and new threats emerging, is it time for an upgrade?