Kody Kemble, of Carrollton, Mo., directs a large road grader on to a trailer as part of a six-week unit on motor graders and skid steers in the Heavy Equipment Operator program Wednesday, Sept. 7, ... more 
Kody Kemble, of Carrollton, Mo., directs a large road grader on to a trailer as part of a six-week unit on motor graders and skid steers in the Heavy Equipment Operator program Wednesday, Sept. 7, 2011, at Linn State Technical College in Linn, Mo. On Wednesday, the central Missouri school began conducting drug screens for all new students and any returning after an extended break in attendance. Students in the Heavy Equipment Operating program, already were subject to similar tests because of federal requirements for commercial drivers' licenses.(AP Photo/Kelley McCall) less 
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Associated Press | Photo By Kelley McCall
Wed, Sep 7, 2011 5:55 PM EDT