The court ruled DOMA is unconstitutional, in a 5-4 decision.
The law prohibits same-sex couples in states where gay marriage is legal from receiving an array of federal benefits available to heterosexual married couples.
Hundreds of people were there with one message to the U.S. Supreme Court: dump the Defense of Marriage Act.
The 1st U.S. Circuit Court of Appeals in Boston said the Defense of Marriage Act discriminates against married same-sex couples by denying them federal benefits.
President Barack Obama says he now supports same-sex marriage, ending months of equivocation on a subject with powerful election-year consequences.
The Defense of Marriage Act (DOMA) is now in the hands of three federal judges after it went before the First Circuit Federal Court of Appeals in Boston Wednesday.
A U.S. judge in Boston has ruled that a federal gay marriage ban is unconstitutional because it interferes with the right of a state to define marriage.