While the link is being fixed, I'll note that this is an issue I have mentioned several time here before. Some DOMA supporters (even here, sadly), falsely claim that DOMA is simply about States rights to decide what marriage is.
But DOMA has 2 parts: that dealing with the States being given the authority to refuse to recognize gay marriage from other States, without their being in conflict with the "good faith and credit clause" in the US Constitution, but also a second part that prohibits the FEDERAL government from recognizing any gay State marriage, or from foreign governments, plus denying Social Security benefits and a thousand other things to gay couples that State marriage grants to straights within the US.
So while on the one hand, Republican hypocrites say DOMA is merely about States rights, when they wrote the bill they made sure that the Federal government can't acknowledge a State's right to grant gay marriage. And before this is thrown in, I'll say that President Clinton's decision to sign the Republican-authored DOMA was shameful, and a political cave-in, to majority Congressional Republicans who threatened to block other legislation Clinton valued more critical to his agenda at the time.