Beags has it in a nutshell.
If the Chinook had carried only its crew, 'cause unknown' would have put this to bed in no time, and Jon and Rick would be resting in peace with their reputations intact.
Well researched, Brian. How will Hoon dig his way out of this one.........
Of course, 5/5/5 may usher in a Sec of Defence with a fairer outlook!