HANOI, Vietnam (AP) — He had met his 6-year-old son only once. A few days together in a life otherwise spent apart. For 15 years, Mohammad Abdullah Al Mamun worked in Saudi Arabia, sending money home to his family in one of the poorest areas of Bangladesh. This year, he had planned to return, build a larger house with his savings and spend time with the child he barely knew. Then, on March 8, a missile struck his workers’ camp. He suffered severe burns and later died. He was among more than two