In response to the conspiracy theorists' claim of a missile hitting the Pentagon, Mete Sozen, a professor of civil engineering at Purdue University argues that: "A crashing jet doesn't punch a cartoon-like outline of itself into a reinforced concrete building. When Flight 77 hit the Pentagon, one wing hit the ground and the other was sheared off by the Pentagon's load-bearing columns." According to "ArchitectureWeek", the reason the Pentagon took relatively little damage from the impact was because Wedge One had recently been renovated. (This was part of a renovation program which had been begun in the 1980s, and Wedge One was the first of five to be renovated.)