Steve Cassidy, Advanced Explosives Demolition explosives technician, grabs dirt to place in one of the 18 holes drilled to hold the explosives for the demolition of a 95-foot brick chimney June 16. The dirt helps prevent a rifling effect with the explosives. A total of eight pounds of explosives were used to bring down the chimney. (U.S. Air Force photo/Airman Nathan Riley)