The Weather Underground townhouse explodes while the terrorist organization is constructing a bomb. The group's headquarters in Greenwich Village at 18 West 11th Street was completely leveled when a dynamite bomb exploded in the basement of the building and severed gas lines that fueled a fire. Three members were killed in the blast just before noon and two others who were upstairs at the time survived and escaped and were placed on the FBI's Most Wanted list, captured a decade later in separate incidents.

The original townhouse was one of a row of houses built in the 1840s. The neighboring homes survived the blast and still stand today, with house number 18 being replaced with a modern design that juts out at a sharp angle toward the street, creating a triangular shape that looks as if the front of the building has rotated horizontally.

In recent years, the front window of the home featured a Paddington Bear toy that would be dressed in a variety of outfits as the seasons and the weather changed.

An IED explodes outside the Times Square Army recruitment office just before 4am, damaging the windows of the recruitment center. Although the bomber was seen on security camera footage, it provided no usable information to their identity and no one has ever been charged in the bombing. A 1980s bicycle found dumped at a nearby construction site is believed to have been the same bicycle the bomber is seen riding to Times Square, but no fingerprints or evidence were retrieved from the bike. The FBI is still actively investigating the bombing and a reward of up to $115,000 is still offered for information leading to the bomber's capture.