because we haven't had a major decision since the ideological shift on the law happening with abortion and justice o'connor in the center and in the end an advocate for at least modest abortion rights retired. so now we have the test of a more conservative supreme court, the center vote being justice kennedy and whether it is that they will in essence the decision in roe versus wade undercut significantly. as pete once described it, this is a back door way to restrict abortion. it's advocated in medical terms but others hope it's almost impossible to have an abortion with them and a major challenge to the basic right. >> give us context about how the court shifted for those of us who don't follow the sbi ka sys of the supreme court. give us a history. when did that happen and where do we find ourselves in terms of