You may recall, from the dark days of Abu Ghraib, that there was a batch of photos that was never released—images the Pentagon deemed so inflammatory that they needed to stay under wraps. The ones we saw were disturbing enough: the piles of naked Iraqi prisoners, the soldier giving a thumbs up next to an ice-packed corpse, the prisoners being menaced by dogs. And who can forget that iconic shot of a hooded man (his name is Ali Shalil Qaissi), standing on a box in a shower with wires attached to his fingers—a mock execution. There are as many as 2,100 additional images, according to the ACLU, which sued the government in 2004 demanding their release. President Obama has resisted the legal efforts, noting in a statement that to make the photos public would "impact the safety of our troops."
Newsweek's Lauren Walker nicely summarizes the developments so far, some of which my colleague Nick Baumann has also covered, so here's the upshot: In August, a federal judge gave the administration an ultimatum: either release the photos or provide evidence for each image explaining why publishing it would be detrimental to national security. On December 19, the administration indicated that it would take the latter course, and a hearing on the new evidence has been set for January 20.