On September 11, 2001 an American Airlines Boeing 767 crashed into the north tower of the World Trade Center in New York City, instantly killing hundreds of people and trapping hundreds more in higher floors. Then, 18 minutes after the first plane hit, a second Boeing 767–United Airlines Flight 175–appeared out of the sky, turned sharply toward the World Trade Center and sliced into the south tower near the 60th floor. America was under attack. The horror in New York took a catastrophic turn for the worse when the south tower of the World Trade Center collapsed in a massive cloud of dust and smoke. At 10:30 a.m., the other Trade Center tower collapsed. Almost 10,000 others were treated for injuries, many severe.