Twin Towers (WTC) By Andre24 Sep 20, 1962 The Port Authority announced the selection of Minoru Yamasaki as lead architect and Emery Roth & Sons as associate architects. Jan 18, 1964 Yamasaki's design for the World Trade Center, unveiled to the public Mar 21, 1966 Demolition work began to clear thirteen square blocks of low rise buildings in Radio Row for construction of the World Trade Center Aug 1, 1968 Construction work began on the North Tower Jan 1, 1969 Construction work began on the South Tower Apr 4, 1973 It was the ribbon cutting ceremony Feb 26, 1993 The first terrorist attack in the WTC occurred in the north tower with the detonation of explosives planted in the underground garage by Ramzi Yousef 2001 Islamist terrorists hijacked American Airlines Flight 11 and crashed it into the North Tower at 8:46:40 a.m. Sep 11, 2001 Islamist terrorists hijacked United Airlines Flight 175 into the South Tower at 9:03:11 a.m. Sep 11, 2001 At 9:59 a.m., the South Tower collapsed and at 10:28 a.m. the North Tower collapsed Apr 27, 2006 The reconstruction of the new World Trade Center begins Aug 1, 2006 The National September 11 Memorial & Museum opens May 10, 2013 The new WTC is inaugurated and is named as: "One World Trade Center"