Bob Schieffer: Good morning, again, this week the Supreme Court takes up two big cases on same-sex marriage, whether the voters can say no to same-sex marriage as they did in California with proposition 8, and whether the 1996 Defense of Marriage Act, which defines marriage as between a man and woman, is constitutional. At the Supreme Court, people are already lining up to get in to see the arguments. Here with us to talk about those cases, Evan Wolfson, head of the group Freedom to Marry. Tony Perkins, the President of the Family Research council. Also joining us Austin Nimocks, who is part of the legal team defending California's proposition 8 and David Frum, conservative columnist for the "Daily Beast" who once opens but now supports same-sex marriage and Baltimore Ravens linebacker Brendon Ayanbadejo, who filed a brief in the court supporting same-sex marriage, he joins us today from Ft. Lauderdale, and Brendon, I want to start with you. We haven't seen too many people from the NFL on the frontlines supporting same-sex marriage. What brought you into this? You filed this brief to be a friend of the court on this. how did you become involved, and why?