HUNDREDS OF PEOPLE returned to their homes early Friday in Riverside, Calif., after authorities said there was no risk that a derailed propane tank car would explode . . . MAJ. GEN. RAYMOND F. REES, a decorated commander in Vietnam, was appointed commander of the U.S. Army National Guard . . . A STRONG EARTHQUAKE struck the southern Iranian province of Fars, the official Islamic Republic News Agency reported. There were no reports of damage or injuries.