Shehri arrived in the United States in early June 2001, staying in budget motels in the Boynton Beach area of south Florida. On September 5, 2001, Shehri traveled to Boston and checked into a motel with his brother. Six days later, Shehri arrived early in the morning at Boston's Logan International Airport and boarded American Airlines Flight 11. Fifteen minutes after takeoff, Shehri, along with his brother Waleed and three others, hijacked the airliner. They deliberately crashed it into the North Tower of the World Trade Center at 8:46 a.m.