An April 7, 1968, photo showing Sen. Robert F. Kennedy, D-N.Y., stepping through the debris of a building razed by fire during a 22-block tour on foot through a badly damaged area in northwest Washington. The April 4, 1968 assassination of Martin Luther King Jr. sparked rioting across neighborhoods in Washington.
An April 7, 1968, photo showing Sen. Robert F. Kennedy, D-N.Y., stepping through the debris of a building razed by fire during a 22-block tour on foot through a badly damaged area in northwest Washington. The April 4, 1968 assassination of Martin Luther King Jr. sparked rioting across neighborhoods in Washington. Pablo Martinez Monsivais AP Photo
An April 7, 1968, photo showing Sen. Robert F. Kennedy, D-N.Y., stepping through the debris of a building razed by fire during a 22-block tour on foot through a badly damaged area in northwest Washington. The April 4, 1968 assassination of Martin Luther King Jr. sparked rioting across neighborhoods in Washington. Pablo Martinez Monsivais AP Photo