Further reading:

The Intercept: How to dismantle the absurd profitability of nuclear weapons

Bloomberg Markets and Finance: Beatrice Fihn Says U.S. Withdrawal From Iran Deal Was an 'Incredibly Stupid Decision'

the Guardian: World nuclear arms spending hit $73bn last year – half of it by US

CNN : The US accounted for nearly half of the $72.9 billion spent on nuclear weapons last year

BBC: Exiting the Bunker (podcast)