Mike Brown / The Commercial Appeal via AP
Marchers parade down Second Street during the annual Martin Luther King Day parade through downtown Memphis, Tenn. Monday, Jan. 16.
Takaaki Iwabu / The News & Observer via AP
Andrew Boudreaux, 10, leads the procession of the annual Martin Luther King Jr. Memorial March in Raleigh, N.C., Jan. 16.
Ben Earp / The Star via AP
Participants make their way along a sidewalk during the Martin Luther King Jr. Unity March in Shelby, N.C.
Nick de la Torre / /Houston Chronicle AP
Candi Flora, a historian wearing actual irons from the days of slavery, raises her arms during the 34th Annual "Original" Dr. Martin Luther King Birthday Parade and Celebration in Houston.
Eduardo Munoz / Reuters
Occupy Wall Street members march during a candlelight vigil to honor Rev. Martin Luther King, Jr. in New York.