Leslie Robertson, chief structural engineer of the World Trade Center in New York, discusses the collapse of the WTC on KGNU Community Radio, Boulder, Co., on the fifth anniversary of 9/11 with physicist Steven Jones. In the fall of 2006, amid controversy surrounding his work on the collapse of the World Trade Center, Jones was relieved of his teaching duties and placed on paid leave from Brigham Young University. On October 20, 2006, he announced his retirement.
Three part YouTube playlist.