Cuban President Raul Castro is in Merida, Yucatan where he met with his Mexican counterpart Enrique Peña Nieto. Their discussions focused on trade, business opportunities, and migration. In the course of the Cuban president's visit, five bilateral agreements were signed, including on a new framework for resolving migration issues and human trafficking. Peña Nieto stressed Mexico's role as an "ally" in the process of change underway in Cuba. Clayton Conn reports from Mexico City. teleSUR