In this photo taken Aug. 7, 2012, Vo Thi Thuy Nga, 24, left, and her uncle Vo Duoc sit inside their home in Danang, Vietnam. She was born with physical and mental disabilities that a rehabilitation ... more 
In this photo taken Aug. 7, 2012, Vo Thi Thuy Nga, 24, left, and her uncle Vo Duoc sit inside their home in Danang, Vietnam. She was born with physical and mental disabilities that a rehabilitation center's director said were caused by their parents' exposure to the chemical dioxin in the defoliant Agent Orange. Washington was slow to respond, but on Thursday, Aug. 9, 2012 the U.S. for the first time will begin cleaning up leftover dioxin that was stored at the former military base, now part of Danang's airport. (AP Photo/Maika Elan) less 
1 / 1
Associated Press | Photo By Maika Elan
Wed, Aug 8, 2012 6:29 AM EDT