More than 200 residents were displaced by a massive eight-alarm fire that tore through an apartment building in Queens Tuesday, and the FDNY is pointing to a pair of missteps that it says allowed the blaze to spread. The fierce flames injured more than a dozen people as the fire quickly spread through the cockloft of the building on 90th Street and 34th Avenue in Jackson Heights. FDNY Commissioner Daniel Nigro said an apartment door was left open at the fire location, reiterating that residents fleeing a fire should always close the door behind them. "The door was open," Nigro said. "The occupant fled, left the door open. We've stressed over the years the seriousness of that if you do unfortunately have a fire in your home or apartment, how important it is to close that door. The fire (traveled) out to the hallway, the units were unable to make a quick advance."