According to Pakistani authorities and the UN, at least 3 million internally displaced persons (IDPs) have now been registered as a result from recent fighting and on-going military operations against the Taliban in Pakistan's Swat, Buner, and Lower Dir districts. Refugee families are often made up of only women and children, the older men staying behind to care for their homes and crops. UN humanitarian chief John Holmes issued a desperate appeal for hundreds of millions of dollars to help those who have fled the war, warning that the U.N. can only sustain its current aid efforts for one month. Photographers in the area have captured many powerful images of those affected, some of the most striking focused on children, from which I've collected 38 here for you. (38 photos total)