Nancy mentioned quiver and arrows in her "good morning" interview w/ george stephanopoulos 20 sep 2020 (5 min mark, see vid). Reference from United States military nuclear incident terminology, wikipedia.
"Empty Quiver" refers to the seizure, theft, or loss of a functioning nuclear weapon.[1]
"Broken Arrow" refers to an accidental event that involves nuclear weapons, warheads or components that does not create a risk of nuclear war.
en.wikipedia.org/wiki/United_States_military_nuclear_incident_terminology
www.youtube.com/watch?v=VRxcfe1ijQ4&t=305s