Since the public opening on April 4, 1973, New York's iconic Twin Towers remained a symbol of the city up until the tragic September 11 attacks. Take a look back at the iconic structures ...

Dirk Delph, 50, of East Flatbush, was at work at M.S. Farrell & Co. on 67 Wall Street when al-Qaeda hijackers crashed jets into the North and South Towers of the World Trade Center on Sept. 11, 2001.

Dirk Delph was at work at 67 Wall Street when al-Qaeda hijackers crashed jets into the ... 9/11 survivor describes being knocked out by force of Twin Towers collapsing — as he visits Ground Zero ...

Twin Towers tightrope walker recalls daring feat 50 years later: ... Petit will recreate his iconic walk inside the Cathedral Church of St. John the Divine on Amsterdam Avenue in his new show, ...

While 23 years has passed, the 9/11 attacks on New York City's World Trade Center and the U.S. Pentagon, should never be forgotten, nor the thousands of innocent lives lost.

Civilians flee down the street as one of the towers of the World Trade Center collapses. Mario Tama/Getty Images President George W. Bush. On 9/11, then-President George W. Bush traveled to the ...