American Airlines Flight 11, operated by a Boeing 767-223ER (N334AA) on the morning of September 11, 2001, departed runway 4R at Logan International Airport in Boston, Massachusetts for the 5+ hour flight to Los Angeles, California at 7:59 am local time. On board the aircraft were 81 passengers (including five hijackers), nine flight attendants, and the two pilots. Shortly after its departure, Flight 11 disappeared from FAA radar screens, and ceased responding to radio calls from air traffic controllers. At 8:24 am, the Captain of another aircraft on the air traffic control frequency, United Airlines Flight 175, reported that We heard a suspicious transmission on out departure from BOS, sounds like someone keyed the mike and said everyone stay in your seats. Less than ninety seconds later, UA 175 would suffer the same fate. At 8:45 am, Flight 11’s aircraft was flown into the side of the North 110-floor tower-between the 80th and 90th floors-of the World Trade Center Plaza in New York City＇s financial district. The aircraft impacted the tower at an estimated 350 knots. This fact, combined with the large amount of burning jet fuel, led to severe structural damage within the tower, which caused its eventual collapse some 104 minutes later at 10:29 am local time.4. At what speed did the aircraft impact the tower?