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

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

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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

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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

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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

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Tammy Haynes, left, Whitney Tillman, center, and Crystal Haynes attend a sermon at the St. Paul Missionary Baptist Church in Sanford, Fla., Sunday. Many in the congregation wore shirts in support of Trayvon Martin. Phelan M. Ebenhack/AP hide caption

itoggle caption Phelan M. Ebenhack/AP

George Zimmerman leaves court with his family after Zimmerman's not guilty verdict was read in Seminole Circuit Court in Sanford, Fla. on Saturday. Joe Burbank/AP hide caption

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George Zimmerman in court on Thursday. Gary W. Green/pool/Getty Images hide caption

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Trayvon Martin's friend Rachel Jeantel testifies in the murder trial of George Zimmerman. Her testimony sparked discussions of the racial issues involved in the case. Jacob Langston /UPI /Landov hide caption

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George Zimmerman in a Sanford, Fla., courtroom on Monday. Joe Burbank/pool/Getty Images hide caption

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