Volunteers Dub Harris, with saw, and Virgil Thompson, right, both from Temple, Texas, cut lumber to build a ramp for a temporary classroom Sunday, April 21, 2013, four days after an explosion at a fertilizer plant in West, Texas. School will resume in for West students Monday in temporary facilities after Wednesday's explosion damaged three of the district's schools. The blast killed 14 people and injured more than 160 others. (AP Photo/Charlie Riedel)