Martin Brennan had a map of Laos and Thailand behind him and an interpreter by his side as he sought to convince a Hmong audience at a Saint Paul church that relatives still in Thailand could return to Laos safely. Brennan is coordinator of Refugee and Migration Affairs for the United States Embassy in Thailand. Last year the Thai government closed Ban Vinai, the largest Hmong refugee camp and will close another by the end of the year. Brennan came to the Twin Cities to ease fears in the Hmong community that refugees who go back to Laos will be persecuted or even killed upon their return.