I've been fascinated with Walker's exploits since I was a kid. But it is disconcerting when I read anecdotes or stories written by those who were dyed in the wool NASA crew or part of the astronaut corps. There always seems to be an undercurrent of resentment and dismissal over a 'civilian' being involved in what was considered elite test pilot duties.

Even Gen. Yeager I believe once intimated that Walker's death during the XB-70 photo shoot was partially his fault due to 'not having the experience in formation flying that an Air Force or Navy pilot would have'. Yeager I believe went on to say that the accident probably would not have happened if all the fliers were military trained.

[Note: I can't find the quote online now, but I believe I saw it in a printed Aviation magazine a couple of decades ago.]

A tad unfair IMO, given all his other achievements.