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The King Center - A coalition of social advocacy groups will join the National Action Network's march for civil rights on Aug. 24 in Washington, D.C. The "Realize the Dream" march coincides with the 50th anniversary of the 1963 March on Washington for Jobs and Freedom on Aug. 28. -- Britt Middletonhttp://www.thekingcenter.org/‎ (Photo: The King Center)

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A. Philip Randolph Institute (APRI) - http://www.apri.org/‎(Photo: Raymond Thompson/The Washington Times /Landov)

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National Association for the Advacement of Colored People - http://www.naacp.org (Photo: Evan Vucci/AP Photo, File)

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National Council of Negro Women - http://www.ncnw.org/‎(Photo: Manny Ceneta/Getty Images)

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National Urban League (NUL) - http://www.nul.iamempowered.com/(Photo: Tasos Katopodis/Getty Images for National Urban League)

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Southern Christian Leadership Conference (SCLC) - http://www.sclcnational.org/(Photo: Erik S. Lesser/Getty Images)

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National Coalition on Black Civic Participation (NCBCP) - http://www.ncbcp.org/ (Photo: NCBCP)

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Leadership Conference on Civil and Human Rights - http://www.civilrights.org/(Photo: Courtesy of CivilRights.org)

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American Federation of State - http://www.afscme.org/(Photo: Mark Wilson/Getty Images)

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County and Municipal Employees (AFSCME) - http://www.afscme.org/(Photo: Bill Pugliano/Getty Images)

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American Federation of Teachers (AFT) - http://www.aft.org/(Photo: Courtesy of AFT.org)

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Communities Without Boundaries International, Inc. (CWBI) - http://www.cwbi.org/(Photo: CWBI)

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1199 SEIU  Healthcare Workers East - http://www.1199seiu.org/(Photo: Bill Clark/ Getty images)

Photo By Bill Clark/ Getty Images

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United Federation of Teachers (UFT) - http://www.uft.org/ (Photo: Michael Loccisano/Getty Images)

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Unite Here! - http://www.unitehere.org/(Photo: Matthew Cavanaugh/Getty Images)

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International Brotherhood of Teamsters - http://www.teamster.org/  (Photo: Win McNamee/Getty Images)

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American Federation of Government Employees (AFGE) - http://www.afge.org/ (Photo: Win McNamee/Getty Images)

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Military Families Speak Out - http://www.mfso.org/(Photo: Brendan Hoffman/Getty Images)

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Fair Vote - http://www.fairvote.org/(Photo: Courtesy of FairVote.org)

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United for Peace & Justice - http://www.unitedforpeace.org/(Photo: Brendan Hoffman/Getty Images)

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Veterans for Peace - http://www.veteransforpeace.org/(Photo: David McNew/Getty Images)

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Planned Parenthood Federation of America - http://www.plannedparenthood.org/ (Photo: Mark Wilson/Getty Images)

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National Congress of Black Women (NCBW) - http://nationalcongressbw.org/(Photo: NationalCongressBW.org)

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National Coalition of 100 Black Women, Inc. (NCBW) - http://www.ncbw.org/(Photo: Courtesy of NCBW.org)

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Black Women's Health Imperative - http://www.blackwomenshealth.org/(Photo: Courtesy of BlackWomensHealth.org)

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National Black Justice Coalition - http://www.nbjc.org/(Photo: Courtesy of NBJC.org)

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Family Equality Council - http://www.familyequality.org/(Photo: Jamie McCarthy/Getty Images for Family Equality Council)

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National Gay and Lesbian Task Force - http://www.ngltf.org/(Photo: Courtesy of NGLTF.org)

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Old Lesbians Organizing for Change - http://www.oloc.org/(Photo: Courtesy of OLOC.org)

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League of United Latin American Citizens (LULAC) - http://www.lulac.org/(Photo: Chip Somodevilla/Getty Images)

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Mexican American Legal Defense and Educational Fund (MALDEF) - http://www.maldef.org/‎ (Photo: Courtesy of MALDEF.org)

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The Hip Hop Caucus - http://www.hiphopcaucus.org/(Photo: John Ricard/BET)

Photo By Photo: John Ricard/BET

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Operation Hope - http://www.operationhope.org/(Photo: Courtesy of OperationHope.org)

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Impact Black Youth Vote - http://www.impact-dc.com/ (Photos: Courtesy of Impact-dc.com; NCBCP.org)

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OurTime.org - http://www.ourtime.org/(Photo: Courtesy of OurTime.org)