President Bush got a firsthand look Thursday at ways the government fights illegal immigration and said that securing the border with Mexico will require more people and modern technology. For Bush's arrival at the airport in nearby McAllen, Texas, the Border Patrol had set up several tools it uses on patrol _ helicopters, a boat and a small plane. "We're going to help build a virtual border," he said. "This border is changing and it needs to change so the Border Patrol can do its job." Guard officials said 6,199 troops were somewhere in the four Southwestern border states. Bureau,...