U.S. President George W. Bush became the second U.S. president to visit post-war Vietnam on Friday, looking to advance mutual trade and security ties and avoid dwelling on a war that still strains the American psyche 30 years later. Thousands of Vietnamese, some smiling, some impassive, some astride motorbikes and bicycles, lined the streets of his motorcade route as Bush arrived in Hanoi to attend the 21-nation Asia Pacific Economic Cooperation summit. Full Story