The silent toxin
The war left behind another threat — one that lurks silently — but is arguably much harder to defuse.
It was not a weapon but a weed killer: Agent Orange, sprayed repeatedly in this area of central Vietnam and parts of the south during the war.
By destroying the dense forest, the spraying exposed the enemy. Now researchers suspect that Agent Orange is responsible for high rates of birth defects-from cleft palate to spina bifida.