Mexican President Vicente Fox said Wednesday that immigration is the most pressing challenge in the relationship between his country and the United States, but it also is their greatest opportunity. Building a wall along the border is not the answer to illegal immigration into the United States, Fox said in Salt Lake City, Utah on his second day of a four-day visit to the western United States. He said Mexico believes it will take more than border enforcement to solve the challenges posed by illegal immigration. “One cannot underestimate the importance of this moment and how complex this issue is for our two nations,” Fox told a special session of the Utah Legislature. “Since the beginning of my administration, the government of Mexico has promoted the establishment of a new system that regulates the movement of people across our border in a manner which is legal, safe, and orderly.” --More