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Vice President Joe Biden and U.S. Rep. John Lewis, D-Ga., lead a group across the Edmund Pettus Bridge in Selma, Ala., Sunday, March 3, 2013. They were commemorating the 48th anniversary of Bloody Sunday, when police officers beat marchers when they crossed the bridge on a march from Selma to Montgomery. (AP Photo/Dave Martin)

Martin Luther King, Jr. and his civil rights marchers cross the Edmund Pettus Bridge in Selma, Ala., heading for the capitol in Montgomery on March 21, 1965. Hundreds gathered Sunday, March 3, 2013 for a brunch with Vice President Joe Biden, and thousands were expected Sunday afternoon to march across this bridge in Selma's annual Bridge Crossing Jubilee. The event commemorates the "Bloody Sunday" beating of voting rights marchers by state troopers as they began a march to Montgomery in March 1965. The 50-mile march prompted Congress to pass the Voting Rights Act that struck down impediments to voting by African-Americans and ended all-white rule in the South. (AP Photo/File) (AP Photo/File)

Civil rights marchers cross the Alabama river on the Edmund Pettus Bridge in Selma, Ala. to the State Capitol of Montgomery on March 21, 1965. The event is known as "Bloody Sunday" because of the beating of voting rights marchers by state troopers as they began a march to Montgomery in March 1965. The 50-mile march prompted Congress to pass the Voting Rights Act that struck down impediments to voting by African-Americans and ended all-white rule in the South. (AP Photo/File)

March leader Hosea Williams, left, leaves the scene as state troopers break up the civil rights voter registration march in Selma, Ala., and put John Lewis, center, of the Student Non-violent Coordinating Committee on the ground on March 7, 1965. (AP Photo/File)

Vice President Joe Biden and other lawmakers leads a group across the Edmund Pettus Bridge in Selma, Ala., Sunday, March 3, 2013. They were commemorating the 48th anniversary of Bloody Sunday, when police officers beat marchers when they crossed the bridge on a march from Selma to Montgomery. (AP Photo/Dave Martin)

U.S. Attorney General Eric Holder arrives in Selma, Ala., Sunday, March 3, 2013. Holder and Vice President Joe Biden addressed thousands who gathered for the annual Bridge Crossing Jubilee on the 48th anniversary of Bloody Sunday, when Alabama State Troopers beat back marchers when they tried to cross the Edmund Pettus Bridge. (AP Photo/Dave Martin)

U.S. Rep. John Lewis, D-Ga., points to where he and others were beaten 48 years ago when they tried to cross the Edmund Pettus Bridge during a civil rights march in Selma, Ala., Sunday, March 3, 2013. At rear is Vice President Joe Biden. At left is U/S. Rep. Terri Sewell, D-Ala., Jesse Jackson is second from left. (AP Photo/Dave Martin)

Vice President Joe Biden embraces U.S. Rep. John Lewis, D-Ga., as they prepare to lead a group across the Edmund Pettus Bridge in Selma, Ala., Sunday, March 3, 2013. They were commemorating the 48th anniversary of Bloody Sunday, when police officers beat marchers when they crossed the bridge on a march from Selma to Montgomery. (AP Photo/Dave Martin)

Thousands of residents await the arrival of Vice President Joe Biden for the annual Bridge Crossing Ceremony in Selma, Ala., Sunday, March 3, 2013. Biden is traveling to Selma on Sunday to participate in the Bridge Crossing Jubilee. The event commemorates the 1965 march, which prompted Congress to pass the Voting Rights Act and add millions of African-Americans to Southern voter rolls. (AP Photo/Dave Martin)

Vice President Joe Biden, right, applauds as U.S. Rep. Terri Sewell, D-Ala., hugs U.S. Rep. John Lewis, D-Ga., after introducing him in Selma, Ala., Sunday, March 3, 2013. Lewis was about to make remarks prior to the Bridge Crossing Jubilee on the 48th anniversary of Bloody Sunday when Alabama State Troopers beat civil rights marchers crossing the Edmund Pettus Bridge. At left is State Sen. Hank Sanders, D-Selma and Selma Mayor George Evans. (AP Photo/Dave Martin)