When we first hear the mention of 9/11, what immediately springs to our minds? It's undoubtedly the morning of September 11, 2001, when nineteen terrorists affiliated with al-Qaeda crashed two of the four hijacked planes into the iconic Twin Towers of the World Trade Center in New York City, USA.

Noida (Uttar Pradesh) [India], August 28: The Supertech twin towers in Noida came crashing down within a span of nearly nine seconds after the use of 3,700 kg explosives on Sunday, thus ending a nine-year-long legal battle.

WASHINGTON DC, Oct 14: Leslie Robertson, the lead structural engineer of the World Trade Center's infamous Twin Towers, was haunted by their collapse and the pain that followed 9/11.