That's because our system has checks and balances and a heirarchy. Kim Jong-un likely has direct phone access to the cammanders in the field, and through secure

That's because our system has checks and balances and a heirarchy. Kim Jong-un likely has direct phone access to the cammanders in the field, and through secured lines. That's the first thing you do, and that doesn't take a genius to figure out. IIRC POTUS can order a nuclear strike by himself. No checks and balances. The "two man rule" is basically two men check the authenticity of the order (IIRC it is encrypted Twitter-length message) and or turn the keys to "vote" launch. Each launch crew in two silos (4 people) need to vote to launch to actually launch. There's not a lot of information on the order of succession and the two-man rule on the Internet. ;( I'd think if everyone above is dead or unreachable the Chairman of the Joint Chiefs of Staff or the Secretary of Education can start nuclear war all by themselves too. No checks or balances either.