A police officer was killed when a gunman opened fire near the Centers for Disease Control and Prevention (CDC) headquarters and the Emory University campus in Atlanta on Friday afternoon, according ...

Por Kathleen Magramo y Ray Sanchez, CNN Los empleados de la principal agencia de salud pública de Estados Unidos, los Centros para el Control y la Prevención de Enfermedades (CDC, por sus siglas en in ...