If Bradley Manning had just been 'disappeared', along with Julian Assange and the Wikileaks staff, how much simpler would it have been to sweep them from the public consciousness? VERY easy. They would have never made the news at all.
That's what this 'indefinite detention' thing is about. It has nothing to do with terrorism except the US government's terrorism. I'm not going to be 'disappeared'. Make sure you aren't either.