At a time when the Iraq war continues to be a defining issue on the American scene, it is ironic that the most powerful and uncompromising documentary on the subject remains almost entirely unknown and unseen in this country. It took Japanese filmmaker Watai Takeharu a year and a half to film more than 123 hours of footage in Iraq, which he managed to edit down to two unforgettable hours. The result is the stunning Little Birds, which plunges the viewer into the middle of the war, in all its sorrow and horror, and never lets up.