Gay Marriage
Massachusetts became the first state to legalize gay marriage in 2003. Reuters

HARRISBURG, Pennsylvania (Reuters) - A federal judge on Tuesday struck downPennsylvania's ban on same-sex marriage, the latest in a series of court decisions across the nation determining gay couples' rights to wed.

The ruling makes Pennsylvania the 19th U.S. state to allow gay marriage in a trend that has gained momentum since the Supreme Court ruled last June that legally married same-sex couples are eligible for federal benefits.