(A partial answer to Jim Wright on Bradley Manning. [Added] I didn't post it there; my wife thought it was too inflammatory.)
My impression, as an outsider, is that all the official channels Manning might have used to raise the issues he encountered were closed during the Bush II administration, and have not been re-opened. If this was to come out, it would have to have come out as a leak.
None of the warmongers of the Bush administration have so much as lost their pensions. Instead, their abuses have become settled policy. So, Manning embarrasses the USA, and possibly weakens some programs, and gets, probably, decades in jail. But top Bush administration officials start a series of wars that make a huge number of enemies in Central Asia and the Middle East, inaugurate policies of torture and assassination that make even more enemies, go free and are lauded as great men.
They also took oaths.