MEXICO CITY – Acapulco authorities discovered the decapitated bodies of two police officers Thursday along with a chilling message from suspected drug traffickers operating in the resort: "So that you learn some respect." "One of them was a police commander and the other an officer," a city spokesman said. The spokesman said he could not confirm media reports that the two slain officers had participated in a shootout in January in which four suspected drug traffickers were killed. The two officers' bodies found Thursday were dumped near the site of that shootout. The handwritten sign demanding respect was taped to...