Letters of last resort

Letters of last resort are like secret notes that leaders of countries can write in case of an emergency. If a country is about to be attacked, the leader can choose to launch nuclear weapons at other countries in order to protect their own. The letter of last resort is written by the leader and filled with instructions about what should be done. It includes directions about who to target, the type of weapons to use, and when to launch them. The letter is kept in a secure place and only opened if a nuclear attack is really happening.