When American Airlines Flight 63 departed Paris for Miami on December 22, 2001, commercial aviation was already reeling from the September 11 attacks three months earlier. The Transportation Security Administration had just been created by Congress under the Aviation and Transportation Security Act to federalize airport security operations. Yet standard magnetometers could not identify plastic-based compounds tucked beneath human feet.
Reid hid composite explosives, pentaerythritol tetranitrate (PETN) and triacetone triperoxide (TATP), inside hollowed-out soles. His failure to ignite the fuse in damp conditions spared 197 passengers and crew, but it exposed an immediate blind spot in screening infrastructure. Within days, US airports instituted random manual shoe inspections. By 2006, the TSA formalized a mandatory shoe removal policy for all standard lanes, pushing footwear onto conveyor belts alongside carry-on bags.
That single tactical shift clogged passenger flow worldwide. Footwear processing added an estimated 1.5 to 2.5 minutes per traveler during peak holiday rushes, forcing airports to reconfigure queue layouts and install thousands of rubber-matted search stations. It also accelerated the procurement of explosive trace detection swabs and advanced imaging technology (AIT) body scanners, fundamentally reshaping terminal architecture.
