What is air force broken arrow?

A "Broken Arrow" is a term used by the U.S. Air Force to refer to an accidental event involving nuclear weapons that does not pose a risk of nuclear war, such as a lost, stolen, or accidentally detonated nuclear weapon. It signifies a serious incident where nuclear safety is compromised but does not involve the use of nuclear weapons against a target. The term emphasizes the importance of maintaining control and security over nuclear arsenals.