One thing I didn't quite understand
These men's mission was to blow up several strategic German targets, operational, I think, right?
Yet they were captured before even meeting their contact...they ended up destroying their own cache of explosives in trying to cover up the details of their mission. So they failed before ever having the chance to succeed, really.
So why then was it so important to get the 12th man? To find out what they WOULD have attacked, if given the chance? And they tortured the other 11 before killing them...and same question there, why?
What kind of information could they have gotten from these 12 that was so important as to have such an extensive search for the one that got away?