Families gathered at the 9/11 Memorial plaza to remember the nearly 3,000 victims of the 9/11 attacks.
The one-story structure will be located at 20 Old Fulton St. near the Watchtower buildings.
Free tickets for the museum's May 21 opening, sponsored by Condé Nast, are available online.
The museum will open to victims' families on May 15 and to the general public May 21.
Bloomberg says the city is in much better shape than when he came into office.
The annual recitation of victims' names began at 8:39 a.m. at the 9/11 Memorial.
New towers are soaring at the World Trade Center, and the 9/11 Museum is opening soon.
Museum members will receive a 10 percent discount for signing up before April 2014.
"The Stories They Tell" gives an inside look at the exhibits of the 9/11 Memorial and Musuem.
Two city runs planned for Sunday are beefing up security in light of the Boston bombings, officials said.
Tourists at the 9/11 Memorial expressed disappointment about a new $2 fee now charged to some visitors.
Survivors and victims' family members gathered at the 9/11 Memorial, 20 years after the 1993 WTC bombing.
A fire in construction trailers sent smoke billowing over the World Trade Center site Wednesday.
The first section of the WTC spire was hoisted atop the building Wednesday morning.
Sections of the WTC spire arrived at Pier 25 Tuesday morning via barge.
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