Thirty-four of 42 passengers were injured when their charter bus rammed into an overpass last night, reports the Boston Globe, after the driver apparently didn't heed clearance signs. The bus was carrying Pennsylvania high school kids, members of the Destined for a Dream Foundation, who had just visited Harvard University. “They were doing a school tour,” says a Boston Fire Department spokesman. “They were heading back to Pennsylvania.” The impact, he said, “pushed in the whole front of the roof.” Four passengers were injured seriously in the crash. The driver was uninjured but could face charges.