ROCHESTER, Indiana (AP) — A 9-year-old girl and her twin 6-year-old brothers were struck and killed by a pickup truck as they crossed a northern Indiana road to board a school bus before sunrise Tuesday, police said. A fourth child was critically injured and airlifted to a hospital. A Tippecanoe Valley School Corp. bus had stopped and lowered its stop arm around 7 a.m. on the road near Rochester just