that's hai duong. >> the training site was supposed to be a secret.ountainous terrain has revealed the likely location. >> translator: this is basic training in hai duong. chi linh. it's located in northern haiduong province. soon we're on our way to chi linh, we've contacted the veterans group there and they've told us about a large gathering of former soldiers. we head to the venue. [ applause ] 150 retired veterans have turned up. they're here to mark the 40th anniversary of the end of the war. they fought in some of the biggest battles and are proud of their legacy. [ speaking foreign language ] >> a break in the ceremonies give us our chance. we start showing the film. these men joined the army around 1971, about the time the film was made. [ speaking foreign language ] >> several of the veterans blurt out the same name. [ speaking foreign language ] >> there was more. [ speaking foreign language ] >> the young man headed off to war is vuu, the son of a prominent chi linh citizen, they said he still lives there. retired army veteran vuu leads us