United Flight 93 was scheduled to depart at 8:00 am, but the Boeing 757 did not depart until 42 minutes later due to runway traffic delays. Four minutes later, American Airlines Flight 11 crashed into the World Trade Center's North Tower. Fifteen minutes later, at 9:03 am, as United Flight 175 crashed into the South Tower, United 93 climbed to cruising altitude, heading west over New Jersey and into Pennsylvania. At 9:25 am, Flight 93 was above eastern Ohio, and pilots Jason Dahl and LeRoy Homer received an alert, "Beware of cockpit intrusion," on the cockpit computer device ACARS (Aircraft Communications and Reporting System). Three minutes later, Cleveland controllers could hear screams over the cockpit's open microphone. Moments later, the hijackers, led by the Lebanese Ziad Samir Jarrah, took over the plane's controls and told passengers, "Keep remaining sitting. We have a bomb on board". Bingham and the other passengers were herded into the back of the plane. Within six minutes, the plane changed course and headed for Washington, D.C. Several of the passengers made phone calls to loved ones, who informed them about the two planes that had crashed into the World Trade Center.