On November 28th, 1942, a fire began in the basement lounge of the Cocoanut Grove Nightclub in Boston and tore through the building. When patrons ran for the doors, they found six of the nine exits were locked, a condition that would now be illegal under fire code standards that were updated after the devastating fire. 492 people were killed, making it the deadliest nightclub fire in history.

In a new documentary, “Six Locked Doors,” some of the survivors recount their stories. Filmmaker Zachary Graves-Miller joined Jim Braude, along with former Boston Mayor Raymond Flynn, who dedicated the lone plaque that memorializes those who died.