Supporters of same-sex marriage rally outside the U.S. Supreme Court in Washington D.C., capital of the United States, March 27, 2013. The U.S. Supreme Court heard arguments on Wednesday in the case of "United States v. Windsor", whether the Defense of Marriage Act (DOMA) violates the Fifth Amendment's guarantee of equal protection of the laws as applied to persons of the sam sex who are legally married under the laws of their State. (Xinhua/Zhang Jun)

Supporters of same-sex marriage rally outside the U.S. Supreme Court in Washington D.C., capital of the United States, March 27, 2013. The U.S. Supreme Court heard arguments on Wednesday in the case of "United States v. Windsor", whether the Defense of Marriage Act (DOMA) violates the Fifth Amendment's guarantee of equal protection of the laws as applied to persons of the sam sex who are legally married under the laws of their State. (Xinhua/Zhang Jun)

Supporters of same-sex marriage rally outside the U.S. Supreme Court in Washington D.C., capital of the United States, March 27, 2013. The U.S. Supreme Court heard arguments on Wednesday in the case of "United States v. Windsor", whether the Defense of Marriage Act (DOMA) violates the Fifth Amendment's guarantee of equal protection of the laws as applied to persons of the sam sex who are legally married under the laws of their State. (Xinhua/Zhang Jun)

Supporters of same-sex marriage rally outside the U.S. Supreme Court in Washington D.C., capital of the United States, March 27, 2013. The U.S. Supreme Court heard arguments on Wednesday in the case of "United States v. Windsor", whether the Defense of Marriage Act (DOMA) violates the Fifth Amendment's guarantee of equal protection of the laws as applied to persons of the sam sex who are legally married under the laws of their State. (Xinhua/Zhang Jun)

Supporters of same-sex marriage rally outside the U.S. Supreme Court in Washington D.C., capital of the United States, March 27, 2013. The U.S. Supreme Court heard arguments on Wednesday in the case of "United States v. Windsor", whether the Defense of Marriage Act (DOMA) violates the Fifth Amendment's guarantee of equal protection of the laws as applied to persons of the sam sex who are legally married under the laws of their State. (Xinhua/Zhang Jun)

Supporters of same-sex marriage rally outside the U.S. Supreme Court in Washington D.C., capital of the United States, March 27, 2013. The U.S. Supreme Court heard arguments on Wednesday in the case of "United States v. Windsor", whether the Defense of Marriage Act (DOMA) violates the Fifth Amendment's guarantee of equal protection of the laws as applied to persons of the sam sex who are legally married under the laws of their State. (Xinhua/Zhang Jun)

Supporters of same-sex marriage rally outside the U.S. Supreme Court in Washington D.C., capital of the United States, March 27, 2013. The U.S. Supreme Court heard arguments on Wednesday in the case of "United States v. Windsor", whether the Defense of Marriage Act (DOMA) violates the Fifth Amendment's guarantee of equal protection of the laws as applied to persons of the sam sex who are legally married under the laws of their State. (Xinhua/Zhang Jun)

Supporters of same-sex marriage rally outside the U.S. Supreme Court in Washington D.C., capital of the United States, March 27, 2013. The U.S. Supreme Court heard arguments on Wednesday in the case of "United States v. Windsor", whether the Defense of Marriage Act (DOMA) violates the Fifth Amendment's guarantee of equal protection of the laws as applied to persons of the sam sex who are legally married under the laws of their State. (Xinhua/Zhang Jun)

Supporters of same-sex marriage rally outside the U.S. Supreme Court in Washington D.C., capital of the United States, March 27, 2013. The U.S. Supreme Court heard arguments on Wednesday in the case of "United States v. Windsor", whether the Defense of Marriage Act (DOMA) violates the Fifth Amendment's guarantee of equal protection of the laws as applied to persons of the sam sex who are legally married under the laws of their State. (Xinhua/Zhang Jun)

Supporters of same-sex marriage rally outside the U.S. Supreme Court in Washington D.C., capital of the United States, March 27, 2013. The U.S. Supreme Court heard arguments on Wednesday in the case of "United States v. Windsor", whether the Defense of Marriage Act (DOMA) violates the Fifth Amendment's guarantee of equal protection of the laws as applied to persons of the sam sex who are legally married under the laws of their State. (Xinhua/Zhang Jun)

Supporters of same-sex marriage rally outside the U.S. Supreme Court in Washington D.C., capital of the United States, March 27, 2013. The U.S. Supreme Court heard arguments on Wednesday in the case of "United States v. Windsor", whether the Defense of Marriage Act (DOMA) violates the Fifth Amendment's guarantee of equal protection of the laws as applied to persons of the sam sex who are legally married under the laws of their State. (Xinhua/Zhang Jun)

Supporters of same-sex marriage rally outside the U.S. Supreme Court in Washington D.C., capital of the United States, March 27, 2013. The U.S. Supreme Court heard arguments on Wednesday in the case of "United States v. Windsor", whether the Defense of Marriage Act (DOMA) violates the Fifth Amendment's guarantee of equal protection of the laws as applied to persons of the sam sex who are legally married under the laws of their State. (Xinhua/Zhang Jun)