On December 29, 1975, a bomb in a coin-operated locker at LaGuardia's central terminal killed 11 people and remains unsolved. The terminal was demolished in LaGuardia's recent overhaul. No memorial or plaque exists anywhere on the property.

At 6:33 p.m. on December 29, 1975, a bomb hidden in a coin-operated locker beside the TWA baggage carousel at LaGuardia Airport's central terminal detonated with the force of 25 sticks of dynamite. It tore a 10-by-15-foot hole in an eight-inch reinforced concrete ceiling, shattered a football field's length of plate-glass windows, and killed 11 people — limo drivers, airport workers, and travelers waiting for rides to Connecticut and Long Island. Seventy-four more were injured. It was the deadliest non-state attack on U.S. soil since the 1927 Bath School disaster and the worst mass-casualty event in New York City since the 1920 Wall Street bombing, until September 11.

That East Elmhurst terminal no longer stands. The Port Authority of New York and New Jersey's overhaul of LaGuardia — which produced the new Terminal B, opened in 2020 — razed the old central building and replaced it without installing any marker for the 11 dead. Not a plaque, not a panel, not a name on a wall. After extensive research and interviews with survivors, victims' family members, and investigators, Slate writer Elon Green reported on July 7 that he "could not find so much as a marker, on-site or elsewhere, commemorating the lives lost" — and that no one had contacted those survivors or families about the bombing for decades.

NYPD Queens chief of detectives Edwin Dreher launched what was at the time the largest investigation in department history: 120 NYPD detectives, 600 FBI agents, and ATF and Port Authority investigators, all working in what the Slate piece documents as a tangle of competing jurisdictions. Investigators theorized anti-Yugoslav Croatian nationalists. Nothing was confirmed. The case remains unsolved.

The Port Authority has not announced any memorial. The bombing is not listed on any marker at the airport it occurred in.