Original sentence: Much of the scientific community does not support the controlled demolition hypothesis and U.Since the September 11, 2001 attacks, a variety of alternative theories (or "conspircay theories" as the mass media refer to them) have emerged about the attacks which contradict the mainstream account of events that day.There are, however, many professionals who have questioned the "official account" of the events that took place.They have also claimed that the collapse of the World Trade Center was the result of a controlled demolition
Edited sentence: Conspiracy theorists have claimed that the collapse of the World Trade Center was the result of a controlled demolition.Since the September 11, 2001 attacks, a variety of conspiracy theories have emerged about the attacks which contradict the mainstream account of events that day.The scientific community does not support the controlled demolition hypothesis and U