Martin Sieff of UPI suggests that the floodgates are opening, and explains why:

Army, CIA want torture truths exposed

...three major institutions in the Washington power structure have decided that after almost a full presidential term of being treated with contempt and abuse by them, it's payback time.

Those three institutions are: The United States Army, the Central Intelligence Agency and the old, relatively moderate but highly experienced Republican leadership in the United States Senate.

... intelligence and regular Army sources have told UPI that senior officers and officials in both communities are sickened and outraged by the revelations of mass torture and abuse, and also by the incompetence involved, in the Abu Ghraib prison revelations. These sources also said that officials all the way up to the highest level in both the Army and the Agency are determined not to be scapegoated, or allow very junior soldiers or officials to take the full blame for the excesses.

... [Seymour] Hersh has spearheaded the waves of revelations of shocking abuse. But other major U.S. media organizations are now charging in behind him to confirm and extend his reports. They are able to do so because many senior veteran professionals in both the CIA and the Army were disgusted by the revelations of the torture excesses. Now they are being listened to with suddenly receptive ears on Capitol Hill.

Republican members in the House of Representatives have kept discipline and silence on the revelations. But with the exception of the increasingly isolated and embarrassed Senate Republican Leader, Bill Frist of Tennessee, other senior mainstream figures in the GOP Senate majority have refused to go along with any cover-up....

Rumsfeld and his team of top lieutenants have therefore now lost the confidence, trust and respect of both the Army and intelligence establishments. Key elements of the political establishment even of the ruling GOP now recognize this....