WILMER, Texas — A bus carrying elderly evacuees from Hurricane Rita caught fire and then was rocked by explosions early Friday on a gridlocked highway near Dallas, killing as many as 24 people, authorities said. "Deputies were unable to get everyone off the bus," Dallas County Sheriff's Department spokesman Don Peritz said. He said he believed 24 people were killed, but added that that number could change. The bus was carrying 43 people who had been traveling since Thursday from a nursing home or managed-care facility near Houston, Peritz said. Early indications were that the bus caught fire because of...