“Were the B-52s built in 1987?”
The last B-52 built came out of the factory over 50 years ago.
http://www.dodbuzz.com/2012/04/04/the-air-forces-newest-b-52-turns-50/
That was my point. These current helicopters are much newer than any model of Boeing B-52. I’d watch already old B-52s head to Vietnam from various Air Force bases where we would shop for groceries (my late father was a retired Marine) as a child. I’m now 54 years old.