Col. Bill Leady, commander of the U.S. Army Corps of Engineers Sacramento District, discusses a wooden bike with the students who assembled it for competition in the sixth annual Folsom High School Engineering Challenge in Folsom, Calif, April 19, 2013. A half dozen personnel from the U.S. Army Corps of Engineers Sacramento District took part as judges for the event that promotes careers in science, technology, engineering and math. Photo cropped for emphasis. (U.S. Army photo by Robert Kidd/Released