Here's your daily look at five stories we're following:
1. Same-sex marriage suit: A federal judge in Philadelphia will hear oral arguments today in a suit brought by a lesbian couple who married in Massachusetts and want their nuptials recognized in Pennsylvania. The lawsuit is one of at least five challenges to parts of the state's ban on same-sex marriage.
2. Convention Center work rules: Today is the first big test for the Pennsylvania Convention Center's new labor agreement, as the BIO World Congress of INdustrial Biotechnology is wrapping up its three-day conference. The four unions that signed on to the new work rules -- rather than the usual six that worked at the center -- will dismantle the exhibits.
3. WCU graduation: A second graduation ceremony will take place today for West Chester University students who could not walk across the stage when Saturday's commencement was rained out.