Just when the flood of Vietnamese evacuees from Katrina started to subside, a wave of Vietnamese Rita victims showed up at a popular Asian mall in southwest Houston this week. "We had 200 people outside our door (Tuesday) morning," said Tram Nguyen, with Boat People S.O.S., an organization that, through its office in the Hong Kong City Mall on Bellaire, has led the effort to help Vietnamese evacuees. Nguyen estimates there are more than 500 Vietnamese evacuees from Rita in Houston. Nearly 5,000 Vietnamese live in Port Arthur and Beaumont, according to the U.S. Census Bureau. As with the Vietnamese...