1. The Ground Zero Flag

The iconic Ground Zero Flag, raised by firefighters on 9/11. A few hours after it was raised, this sacred relic simply disappeared. Then, a multi-million dollar collection of jewel-encrusted swords and daggers that once belonged to Harry Truman is stolen, in a daring daylight heist. Plus: the incredible story of John Dillinger's Tommy gun, stolen from a police station before becoming his favorite weapon, goes missing for decades.