Originally posted by the Voice of America. Voice of America content is produced by the Voice of America, a United States federal government-sponsored entity, and is in the public domain. President Obama Pays Tribute to Martin Luther King Jr. 18 January 2010 President Barack Obama hugs his daughter Malia Obama, as they serve lunch to people at So Others Might Eat in Washington, 18 Jan 2010 Photo: AP President Barack Obama hugs his daughter Malia Obama, as they serve lunch to people at So Others Might Eat in Washington, 18 Jan 2010 U.S. President Barack Obama has marked the holiday for slain civil rights leader Martin Luther King Jr. with an unannounced visit to a relief organization providing support to earthquake victims in Haiti. The president and his wife, Michelle Obama, stopped Monday at an American Red Cross center in Washington, where the president thanked workers for their efforts. Earlier, Mr. Obama and his family visited a social services organization (So Others Might Eat), where they served lunch to the needy. The president, his wife, the couple's two daughters and the children's grandmother also greeted staff members and about 150 residents as they ate. Mr. Obama also hosted a White House meeting with African-American senior citizens and their grandchildren about the legacy of the civil rights movement. He speaks later at a concert celebrating King's legacy. King was a Baptist preacher who fought against discrimination in the 1950s and 1960s in the southern United States. He gained prominence after leading a successful protest against segregation on the Montgomery, Alabama bus system. In 1964, the U.S. passed the landmark Civil Rights Act to make segregation illegal. King won the Nobel Peace Prize that same year. He was assassinated on April 4, 1968, in Memphis, Tennessee. Americans celebrate King's memory on the third Monday of January by volunteering to help others. In one activity, about 180 volunteers representing several organizations painted the walls of the Ferebee-Hope elementary school in southeast Washington. The activity was designed to try to create a brighter and more stimulating environment for students at the school. City authorities refurbished the school in the middle of last year by adding walls to floors that previously contained open space, but they left the new walls white. Principal Sharron Stroman told VOA she is grateful to local groups who volunteered to paint the walls. .