Hang on a sec, with that Trump tweet where he said he had a "bigger nuclear button than DPRK" I've had a sudden realisation

Nukes aren't fired like that. To order the nukes to be fired it's effectively just the President making a phone call. There's no big red button involved

So either Trump is speaking metaphorically (unlikely), or his aides have just gone to Staples, bought an "EASY" button and told him it fires the nukes

I feel slightly safer now