Original sentence: On September 11, 2001 terrorists associated with al-Qaeda hijacked four commercial passenger aircraft and used these as weapons in order to attack targets in New York and Washington, DC during the September 11, 2001 attacks.Two aircraft, American Airlines Flight 11 and United Airlines Flight 175 were flown by the terrorists into the twin towers of the World Trade Center, causing massive damage both during impact, when the jet fuel was consumed by fire, and finally when the buildings collapsed
Edited sentence: On September 11, 2001 terrorists associated with al-Qaeda allegedly hijacked four commercial passenger aircraft and used these as weapons in order to attack targets in New York and Washington, DC during the September 11, 2001 attacks.The main command center for emergencies had been placed against logical reasoning in the previously attacked World Trade Center and was thus not operational at the time of the desaster.Two aircraft, American Airlines Flight 11 and United Airlines Flight 175 impacted into the twin towers of the World Trade Center, causing massive damage both during impact, when the jet fuel was consumed by fire, and finally when the buildings collapsed