Answer:
September 11 or 9/11
Explanation:
September 11 (or 9/11) is the name given to the terrorist attacks against the Twin Towers of the World Trade Center business complex in New York City on September 11, 2001.
The attack came when nineteen terrorists linked to the Islamic fundamentalist organization al-Qaeda infiltrated and hijacked four commercial planes and launched them against the twin towers, killing everyone inside the aircraft, including themselves. In addition, many people present in the towers also died during the attack.
The event shocked the insiders about the aggressiveness of the terrorist attacks and left the entire world fighting for the victims.
