It is a pleasure to announce the incorporation as visiting researcher to our Institute of the State. Sergio Trejo, predoctoral researcher at CC Policies of the UNAM (Mexico), who will work for a semester under the direction of Dr. Pozo Serrano, in his doctoral thesis “The American National Security: an approach to the evolution of the Organization of the Treaty of the North Atlantic (NATO) and the role of the Organization in the current conjuncture”.