SAN BERNARDINO, Calif. — As many as three gunmen believed to be wearing military-style gear opened fire Wednesday at a Southern California social services center "as if they were on a mission," killing at least 14 people and wounding more than a dozen others, authorities said. Hours later, police hunting for the attackers riddled a black SUV with gunfire several miles away, and one person lay motionless in the street — dead or dying — with a gun nearby. Officers appeared to remove a second person from the vehicle.