9/11 Memorial Closed Following Construction Accident at WTC4The 9/11 Memorial was forced to close Wednesday afternoon following a minor construction accident at WTC4, the second accident in as many days at the site.CopyFacebookXTruthGettrLinkedInTelegramEmailSaveOne World Trade Center (left) is viewed from Three World Tade Center on June 25, in New York City. A ceremony was held at Four World Trade Center as the last steel beam was hoisted 977 feet to the top of the building. The trapezoidal glass and steel office building, which is designed as an architectural backdrop to the September 11 Memorial, is scheduled to open in 2013. Spencer Platt/Getty ImagesBy Kristen Meriwether6/27/2012Updated: 10/1/2015Print