Americans Observe 25th Anniversary of Martin Luther King Holiday with Service Congresswoman Giffords Recovering in Tucson; Walk for Peace Honors Victims Southern Sudanese Vote on Independence Ends; Many Returnees Have No Homes or Jobs Protestors in Tunisia Demand Changes in Government Brisbane, Australia Faces Major Cleanup; Citizens Volunteer to Help Flooding Hits Brazil, South Africa, Asia and U.S. Pacific Northwest Hundreds of Marchers Brave Cold in Dayton's Martin Luther King Memorial March New Exhibit Gives a Taste of Travel to Mars (Lesson plan included) Technology Takes Doctors on Virtual Ride to Hospital Brave Police Officer Saves Girl from Frozen Lake Get to Know Ohio - Gallia County Florida Amputee Succeeds at Kite Surfing Texas Veterinary Hospital Helps Military Mutts Get Back on Their Feet Indianapolis Mom Shares Recipe for Snow Ice Cream Snowman Record Set in Salt Lake City, Utah Michigan Artist recreates Da Vinci's "The Last Supper" in Dryer Lint NewsDepth Web Extra: Toronto Zoo Animals Enjoy Winter Inside and Out