How the Nuclear Football Works

TL;DR

The nuclear football is a briefcase containing strike plans, authentication codes, and communications equipment giving the president sole authority to launch nuclear weapons.

Key Points

• 1.Three nuclear footballs exist, not one. One travels with the president, one with the vice president, and one is kept as a spare at the White House — each carried by a military aide who has passed the highest-level Yankee White background check.
• 2.The black book is a 75-page condensed menu of nuclear strike options. It summarizes OPLAN 8010-12, a 1,000+ page classified war plan covering five global threats (confirmed: Russia and China), with casualty estimates and color-coded visuals to aid quick presidential decisions.
• 3.The 'biscuit' is a laminated credit-card-sized authentication card essential to launching a strike. Presidents have famously mishandled it — Reagan's was found in his shoe after he was shot, Carter left his at the dry cleaners, and Clinton reportedly lost the codes for months.
• 4.Launching requires a two-letter phonetic challenge between the president and the Pentagon. Once identity is confirmed via a code on the biscuit — changed daily — the order is executed and cannot be vetoed by anyone else in the chain of command.