A Haitian man walks past a sign requesting help and supplies in Port-au-Prince, Haiti, Jan. 19, 2010.
Units from all branches of the U.S. military are conducting humanitarian and disaster relief operations as part of Operation Unified Response after a 7.0 magnitude earthquake struck the country Jan. 12, 2010. (DoD photo by Mass Communication Specialist 2nd Class Michael C. Barton, U.S. Navy). Original public domain image from Flickr