Wednesday, June 30, 2010 An explosion at the University of Missouri-Columbia (Mizzou) on Monday afternoon left four people injured, authorities say. The explosion occurred in a science laboratory in Schweitzer Hall around 2:20 p.m. CDT (1920 UTC) Monday. The source of the explosion was first thought to have been a 2,000-pound (907.2-kilogramme) hydrogen tank, but […]