Cleared of the most serious charge — aiding and abetting the enemy — but convicted of most everything else, including espionage, Pfc. Bradley Manning is now facing sentencing, which could land him behind bars from roughly zero to more than 100 years.

It's a wild range, and the result will ride on whether the military court views him as a naive but sincere whistle-blower (his attorney's and supporters' belief) or a callous traitor (the prosecution) who knew or should have known that his massive leak of classified documents to WikiLeaks would have negative consequences for American lives and interests around the world.

But how does Manning stack up in the taxonomy of recent spillers of national-security secrets?