On Saturday, performances and memorials around the city and online will mark the 20th anniversary of the attacks. Here’s how to find them.On Saturday, performances and memorials around the city and online will mark the 20th anniversary of the attacks. Here’s how to find them.Read MoreSeptember 11 (2001), World Trade Center (Manhattan, NY), Music, Dancing, Green-Wood Cemetery (Brooklyn, NY), Lincoln Center for the Performing Arts, Metropolitan Opera, National September 11 Memorial and Museum, New-York Historical Society, Riverside Church
