It was definitely torture and illegal; and right up to the top (including George W. Bush), those responsible (those who authorized it and/or participated in it) should all still be prosecuted to the fullest extent of the law. There is no statute of limitations on this.
Punishment is another matter. First make it a matter of record that those guilty were found so. This is a matter of many things, not the least of which is moral hazard.
Turning a blind eye to this, as Barack Obama has done, tells those in the future that they'll be allowed to get away with it.
This should not stand. The American people should not stand for it.
The Senate report quotes a series of August 2002 cables from a C.I.A. facility in Thailand, where the agency’s first prisoner was held. Within days of the Justice Department’s approval to begin waterboarding the prisoner, Abu Zubaydah, the sessions became so extreme that some C.I.A. officers were “to the point of tears and choking up,” and several said they would elect to be transferred out of the facility if the brutal interrogations continued.During one waterboarding session, Abu Zubaydah became “completely unresponsive with bubbles rising through his open, full mouth.” The interrogations lasted for weeks, and some C.I.A. officers began sending messages to the agency’s headquarters in Virginia questioning the utility — and the legality — of what they were doing. But such questions were rejected.