That's the launch infrastructure and only in some circumstances is that required. An order from the US president to launch nuclear weapons can only be rescinde

That's the launch infrastructure and only in some circumstances is that required. An order from the US president to launch nuclear weapons can only be rescinded by the US president: https://asia.nikkei.com/Politics/Nuclear-button-U.S.-has-no-way-to-stop-president-s-legal-order https://asia.nikkei.com/Politics/Nuclear-button-U.S.-has-no-... This is well known, there was a submarine captain who was dismissed for inquiring about it in the US Navy.