In an interview on TV down here a 'military expert' has said that latest intelligence shows that the insurgents have already formed small squads who's sole task it was to 'Get Harry'.
I believe it is fair to say they would have been suicide type operations and would have inflicted many more casualties than just Harry and because they were suicide missions no withdrawal plan would be required.
Harry would just be the catalyst for a very ferocious and deadly assault on his unit that would be out of proportion to the threat they pose to the insurgents.
The decision, in the end, is not just about Harry's safety but about saving what had the potential to be a bloodbath bringing misery on a wide scale.