After a visit to Harvard University, 34 people in a group of 42 high school students and adult chaperones from Pennsylvania were injured when their charter bus crashed into an overpass Saturday night. Authorities described a harrowing situation, with some rescued through the roof of the vehicle. Police said the driver, who was not injured, failed to heed low-clearance warning signs. One person was hospitalized with life-threatening injuries, three others serious, and the remaining minor.
