ALBUQUERQUE, N.M. — A 9-year-old boy with a massive tumor was whisked from a dangerous neighborhood in Mexico in an armored vehicle by U.S. agents and taken across the border for treatment in New Mexico, his family said. The boy and his parents were snatched Thursday from the gang-infested neighborhood in Ciudad Juarez — one of the deadliest cities in the world — after members of a New Mexico Baptist church saw him near an orphanage and sought help. The parents of the child, identified by officials only as Jose to protect his family, said the tumor on his shoulder...