A girl holds a page that she has colored at a center for children affected by dioxin exposure in Da Nang, Vietnam. The Da Nang Association of Victims of Agent Orange/Dioxin says that more than 1,400 children around the city suffer from mental and physical disabilities because of dioxin exposure, a legacy of the U.S. military's use of Agent Orange and other herbicides during the Vietnam War more than 40 years ago. About 200 children attend three centers operated by the group, which aims to teach the children how to read and write, sew clothes and make handicrafts. Another goal is to provide them with some limited vocational skills, but nearly all who have been sent out to work have eventually returned, unable to integrate into society, says Phan Thanh Tien, association president. May 28, 2012.