In 1996, the U.S. Congress passed the Defense of Marriage Act, which states that the federal government does not recognize same-sex marriages. However, some states do recognize same-sex unions via marriage, civil unions or domestic partnerships.PICTURED: Roby Chavez (L) hold hands with partner Chris Roe (R) during their wedding ceremony, officiated by Rev. Dwayne Johnson in Washington, DC on August 21, 2010 . Washington D.C. became the sixth place in the U.S. to legalize same-sex marriage.
Alex Wong/Getty Images