Nguyen Duc, 32, poses for a portrait outside his office in the Agent Orange children's ward at Tu Du Hospital in Ho Chi Minh City, Vietnam. Duc and his brother Viet were born as conjoined twins, a result of their mother's exposure to Agent Orange during the Vietnam War. They were surgically separated in 1988, seven years after their birth, and his non-cognitive brother died in 2007 after years of health problems. Duc has since married, and now has 4-year-old twins of his own. They are both normal, he says. May 1, 2013.