In an Wednesday, April 16, 2014 photo, Eric Smith, left, a student in an Industrial and Facilities Maintenance class at Dixie Applied Technology College (DXATC), fires a potato cannon he built for the class while his instructor, Lee Devine, holds the barrel steady on the old St. George Airport runway. There was a competition to see who could make the vegetables fly the farthest at the south end of the old runway. Students majoring in industrial facilities maintenance are studying what's called fluid power, which includes hydraulic, pneumatic, pump and valve system science. (AP Photo/The Spectrum, Jud Burkett)
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