Google and the UN High Commission for Refugees -- the United Nations agency responsible for tracking and caring for refugees from the world's conflicts -- unveiled a Web-based mapping tool Tuesday meant to help raise awareness of displaced populations. The tool, Google Earth Outreach, will help to highlight efforts to help millions of people forced to flee their homes because of war and other conflicts. Using Google Earth and Maps, the agencies can create multimedia presentations by layering text, audio and video over maps showing where refugee hotspots are located.