25. Terrorist attacks, USA
September 11, 2001, in the United States is the day when a group of terrorists hijacked four aircrafts in order to attack several objects. The first two planes crashed into the World Trade Center towers in New York, the third one into the Pentagon building, and the fourth aircraft headed to Washington didn’t reach the object owing to the crew and passengers resistance. According to official statistics, about 3,000 people were killed.