Description: This poster depicting parts of an airliner’s flight recorder was produced to help law enforcement officers locate the missing "black boxes."
Context: Police investigators combed the debris of the World Trade Center looking for personal objects and evidence about the hijacking. High on the list of things to find were the two flight recorders (“black boxes”) from each of the two planes that had been used to destroy the Twin Towers. The Federal Bureau of Investigation (FBI) and National Transportation Safety Board (NTSB) created a poster to show all the law enforcement officers at the Staten Island recovery site, most of whom had never seen a flight recorder, what they should search for. No flight recorders were recovered from the World Trade Center debris.