As reported by the Associated Press on March 24, 2014, the National 9/11 Memorial and Museum, dedicated to the victims of the Sept. 11 terrorist attacks, will open to the public at the World Trade Center on May 21.

A ceremony on May 15, will be followed by a six-day dedication period during which the museum will be open round the clock for 9/11 family members, rescue and recovery workers, and others directly affected by the 2001 attacks.

The museum includes two core exhibitions at the foundation of the trade center complex.

One of them, called “In Memoriam,” pays tribute to the 2,983 people killed in the Sept. 11, 2001, attacks as well as the six people killed in a truck bombing at the trade center on February 26, 1993. The other, a three-part historical exhibition, tells the story of Sept. 11 and explores what led to the terrorist strikes.

The planned ticket price is $24, though there will be no admission charge for relatives of Sept. 11 victims or for rescue and recovery workers. Children age 6 and younger will get in free, and admission will be free for everyone on Tuesdays from 5 p.m. and 8 p.m.

There is no charge to enter the World Trade Center memorial plaza, which is already open. About 5.3 million people visited the plaza last year to see the two huge fountains that sit in the original footprints of the twin towers.