On September 11th, 2001, two planes flew into the World Trade Centers in New York City. At 8:46 am the first plane hit the first tower. Eighteen minutes later at 9:03 am, the second plane hit the second World Trade Center. This day is a day to remember because it was a very sad day for everyone in the United States. People sacrificed their lives to save others in need. At first, people didn't know what was going on. People thought that it was a plane that accidentally crashed into the World Trade Center. Then, when the second plane flew into the other tower everyone knew it was a terrorist attack. People had nothing else to do but just stand there and watch the whole thing happen with nothing they could do about it. It took about nine months to clean up all of the debris. It took about nine years to rebuild the towers. There is also a memorial and museum to honor those who died that day.