President Obama tackled race head-on in his first on-camera response to George Zimmerman's acquittal in the shooting death of Florida teenager Trayvon Martin. Carolyn Kaster/AP hide caption

itoggle caption Carolyn Kaster/AP

President Obama during his appearance at the White House on Friday. Saul Loeb /AFP/Getty Images hide caption

itoggle caption Saul Loeb /AFP/Getty Images

President Obama at the White House on Friday, as he spoke about the death of Trayvon Martin and the national discussion that the case has generated. Larry Downing /Reuters /Landov hide caption

itoggle caption Larry Downing /Reuters /Landov

Attorney General Eric Holder speaks at the annual convention of the NAACP in Orlando, Fla., on Tuesday. Holder told the convention that "Stand Your Ground" laws that have been adopted in 30 states should be reconsidered. David Manning/Reuters /Landov hide caption

itoggle caption David Manning/Reuters /Landov

Los Angeles Police Department officers in riot gear detain a man after disturbances in the streets around Leimert Park. Kevork Djansezian/Getty Images hide caption

itoggle caption Kevork Djansezian/Getty Images

In Los Angeles on Sunday, demonstrators expressed their anger over the acquittal of George Zimmerman on the charges he faced for the death of Trayvon Martin. Jim Ruymen /UPI /Landov hide caption

itoggle caption Jim Ruymen /UPI /Landov