A teacher and students from a Christian school are stunned that Supreme Court police barred them from quietly praying on the front steps of the highest court in the land. How is it that the free exercise of religion guaranteed in the first amendment of the Constitution would be blocked in front of the institution tasked with protecting them? What does the law say? How do police really interpret it? And what will happen next in this case? We ask Nate Kellum, senior counsel at the Alliance Defense Fund.