More than six months after dozens of rusty chemical barrels were unearthed from former U.S. military land in Okinawa City, their contents have been identified - and they appear to offer conclusive proof that the toxic Vietnam War defoliant Agent Orange was buried on the island. 

Announced in early July, the results of two separate studies - one conducted by Okinawa City and one by the Okinawa Defense Bureau - both detected the three signature components of Agent Orange: the herbicides 2,4,5-T and 2,4-D as well as highly-toxic TCDD dioxin. 

This is the first time that all three ingredients have been discovered on ex-Pentagon property on Okinawa.

About half of the 61 barrels also bore markings from the Dow Chemical Company - one of the largest manufacturers of Agent Orange for the U.S. military.