So what you guys think what it is exactly? Unman spy plain?Or what !! alien ufo ? what you think about it if any one can find out which part it could be if its spy aeroplane ???

It looks like pretty conventional aircraft construction (aluminum, rivets, etc.). If we could examine the largest piece of structure, it probably has part numbers and manufacturer's inspection stamps. That would nail down the type of aircraft.

Vietnam?

I agree it seems very conventional in construction most likely it was a documentary about a old B-52 that was shot down during the Vietnam War or possible some other type of war plane