Original: Approximately thirty minutes into the flight, the hijackers forcefully breached the cockpit, and overpowered the pilot and first officer, allowing lead hijacker and trained pilot Marwan al-Shehhi to take over the controls.
Simplified: Unlike American Airlines Flight 11, which crashed into the North tower 17 minutes earlier, Flight 175 was seen on television because of the media attention drawn to the scene from the crash of Flight 11.