U.S. Marks 21st Anniversary Of 9/11 Attacks

9/11, two numbers that almost every American knows what it shows. 9/11/2001 was the date when two planes hit the world trade centre in New York, one devastated the pentagon headquarters and one crashed in a field following a passenger revolt. It all happened on the morning of Tuesday when two commercial airliners hit the world trade centre that killed more than 3000 people.