Robert Gates, who some may recognize as a Republican and the freaking Secretary of Defense, has said that only 4-5% of released detainees have returned to the battlefield. Given that 245 detainees have been released, that puts it at 8 or 9 individual recidivists. Not 61.
So where are they getting the high number? Apparently, participating in a documentary about Gitmo is considered "returning to the battlefield." Oy.