i was in vietnam about 4 years back. when in hanoi i visited the prison that john McCain was held captive in. i was told at the time there is an old aircraft from the war in the lake of hanoi (not visible). not sure if this is the one you are refering to. also not sure if this was the craft that JM was on either. i will have a search. if i find anything, i will post a link on here for you. ps, you will find an abundance of military museums when you get there. enjoy, but do watch out for the humongous rats that roam the streets at night. the locals trap them and eat them. : (