Beau was in Jag in the National Guard. Went to Iraq as a lawyer. Spent his time in an office, not the front lines. Died years after returning home of brain cancer. Biden read an article years later after the fact about burn pits that some scientists speculated could have caused been the cause of death to soldiers in the field who were exposed to them. Biden naturally has since gone with my son died in the war narrative. No one, other than him, has directly attributed his death years later to a burn pit. The science is not settled and scientists are divided on whether burn pits are a cancer cause.
And being a JAG and an officer it is doubtful he was ever near a burn pit
I also seriously doubt that the Jag offices were placed anywhere near the burn pits.
Either Joe has dementia to the point that he is so confused about the facts or he just makes stuff up because no one calls him on it.