Wyatt Tan (left) and Mark Nomadiou, both of New York City, kiss in front of the Supreme Court in Washington on Wednesday, March 27, 2013, before the start of a court hearing on the 1996 Defense of Marriage Act (DOMA). In the second of back-to-back gay-marriage cases, the high court is turning to a constitutional challenge to the law that prevents legally married gay Americans from collecting federal benefits generally available to straight married couples. (AP Photo/Carolyn Kaster)