By Ray Stern Pacts signed recently by top law enforcers in Arizona and Mexico seem to be a good step in boosting the crime-fighting cooperation efforts of both countries. After all, as the Tucson Citizen noted in an opinion column on Sunday, "people and drugs flow illegally from Mexico into the United States," while money and guns go the reverse route. Interestingly, though -- neither the pact signed by state Attorney General Terry Goddard on July 29 in Seattle nor the pact he signed on Friday in Hermosillo, Mexico mention the biggest elephants in the room: smugglers of drugs or illegal immigrants. ...