Original sentence: In the article "Active Thermitic Material Discovered in Dust from the 9/11 World Trade Center Catastrophe", which appeared in the Open Chemical Physics Journal, authors Niels Harrit of the University of Copenhagen's Department of Chemistry, Jeffrey Farrer of Brigham Young University's Department of Physics and Astronomy, Steven E.Jones, and others state that thermite and nanothermite composites in the dust and debris were found following the collapse of the three buildings, which they conclude to be proof that explosives brought down the buildings
Edited sentence: In 2009 a highly controversial article, "Active Thermitic Material Discovered in Dust from the 9/11 World Trade Center Catastrophe", appeared in the Open Chemical Physics Journal by Niels Harrit of the University of Copenhagen's Department of Chemistry, Jeffrey Farrer of Brigham Young University's Department of Physics and Astronomy, Steven E.Jones, and others.The authors claim that thermite and nanothermite composites in the dust and debris were found following the collapse of the three buildings.These findings were used as proof that explosives brought down the buildings