A ceremony was held Wednesday to honor the six people killed in the 1993 World Trade Center bombing.
Families of the six victims, survivors and dozens of Port Authority workers arrived at the 9/11 Memorial, 27 years after the first attack on the site.
Stephen Knapp, whose father was killed in the bombing, says it’s important to gather and remember the tragedy.
“Not a lot of people have gone through this experience and it's a chance for us to kind of get together and go over the good times that they all had together,” he said.
On Feb. 26. 1993, in an underground parking garage beneath the North Tower a 1,200-pound bomb was detonated at 12:18 p.m.
The explosion caused a series of power outages, trapping people in elevators and almost instantly shut down all communication systems. Smoke quickly swept through the towers and around 50,000 people began evacuating the buildings.
Helicopters were forced to land on the top of the towers and people were transported from the roof.