New York’s LaGuardia airport was evacuated and flights were halted for about two hours after a man’s shoe set off a false alarm during screening. A search was launched for the man after he was allowed to pass through security despite setting off the alarm for explosives residue.

Officials could not say immediately why the man was allowed to pass through.

Hundreds of people were evacuated from the Delta Airlines terminal and departures temporarily suspended.

The man, who had been selected for secondary screening, afterwards “put on his shoes and exited the area”. Several hours after the alert was raised, the man had still not been found.

I don’t think they ever figured out what he’d stepped in.