The past few decades have seen profound changes in the bilateral relationship between the United States and Mexico. The interests of the two countries, which often diverged during the Cold War years, increasingly began to converge following collapse of the Soviet Union in 1989. With this convergence, bilateral relations seemed to enter a more cooperative stage. The signing of the North American Free Trade Agreement (NAFTA) in 1993 was deemed a fitting symbol of the new, mutually beneficial relationship between the two countries.