Earlier quoted context omitted.
One wonders: does one really fly four bombing sorties in a week, get discharged, and get home within seven days? That sounds remarkably quick by government work standards.
Yes. The post is clearly fake. Even if the author hadn't messed up with any facts, the style of the writing gave it way. You'll notice that there are tons and tons of details. Everything is as specific as possible in an effort to adhere to "Show Not Tell". Even if we believed someone could have a memory this crystal clear after 40 years, many of the details are completely meaningless to the premise that is presented…
I'm not claiming the story is real, but just presenting a counter view to the above. You seem to be assuming that:
A: This is real memories, given the story he's obviously thought about that encounter a lot. So, it's hardly been 40 years, it's been constantly repeated in his mind - also evolving. Some of the details might be wrong, some only carry the sentiment of what he believed he would have felt at that time. If, 40 years ago, he heard the same story he told now he might barely recognize it. Given that he contemplated suicide and add to that that he believes this be the turning point for getting past that (whether that is true nor not is irrelevant). It is no surprise that he has strong feelings and vivid memories from it.
B: Since when is memory organized by meaningfulness? Also, what is meaningful?
I'm not even 40 years old but, as an example, I could tell you in ridiculous detail of a presentation I did in school with two friends of mine when I was 11 years old. (~20 years ago), I could tell you about memories of the notes that we had for the presentation (handwritten notes written on the printed document we had produced) - I remember some of the images we used (and how they were completely irrelevant to the topic). Is that in any sense meaningful? God no. Is my memory crystal clear? Not at all, for one there are huge gaping holes that I either won't mention or that I must interpolate to get at (I do remember the overall context and sentiment, from that I could just assume (and believe) everything else was ordinary), but as an observer you'll mostly forgive that because I can tell you the color and the shape I used to circle a specific note on that document - and how I messed it up and rather than circling the note a lot of it ended up on the outside of it. Or how we messed up the order of the overhead sheets etc.
And that is about a boring presentation that I've not given much thought on, not a life-changing event that had a very sudden and thought-provoking ending.