File – A school bus idles in the parking lot of the Mabel Hoggard Elementary School on Tuesday, May 4, 2010, in Las Vegas. The Education Support Employees Association, which represents the support staff to include bus drivers for the Clark County School District, is the first of four unions to reach a tentative agreement with the district in a move designed to save money. (JOHN LOCHER/LAS VEGAS REVIEW-JOURNAL)