By Nancy Benac, Associated Press WASHINGTON (AP) _ President Barack Obama is leaving on a weeklong, 16,000-mile trip to Asia as part of his effort to pay more attention to the region and boost economic and security cooperation. He’ll spend three days in Vietnam, with stops in Hanoi and Ho Chi Minh City, formerly Saigon, for meetings with top leaders, a speech on US-Vietnam relations, visits to cultural treasures and sessions with civic leaders and entrepreneurs. From Vietnam, he heads to Japan for a summit of the Group of Seven industrialized nations and a historic visit to Hiroshima. Photo courtesy of dw.com Along the way, Obama will make a big push for the 12-nation trans-Pacific trade agreement, which includes the U.S., Vietnam, and Japan. The deal is stalled in Congress, but Obama hopes it will one day increase trans-Pacific trade and make it easier for U.S. workers and companies to compete [...]