The move by Mexico to allow the transfer of Rafael Caro Quintero to the United States signaled a potentially new era of cooperation in the drug war.

NEW YORK — Cartel leaders Rafael Caro Quintero and Vicente Carrillo Fuentes are set to be arraigned in a U.S. federal court in New York City on Friday, following their surprise transfer from Mexico. The pair were among 29 Mexican prisoners sent Thursday to eight cities across the U.S.

After years as one of U.S. authorities' most wanted men, Mexican drug cartel boss Rafael Caro Quintero was brought into a New York courtroom Friday to answer charges that include orchestrating the 1985 killing of a U.