i want to bring back in fordham professor christina greer.e look ahead to the thousands who will march today across the edmund pettus bridge in selma, talk to us about the importance of historical continuity. this is of course an annual march, but it's the 50th anniversary and it obviously is getting a lot of attention. why continue to do this march every year? >> well i think it's because for many black people across this country, every sunday is bloody sunday. and it is very important that we recognize the 50th anniversary. however, on a day-to-day basis, so many black communities are experiencing brutality, indignity, racism injustice, on a wide scale, not just with voting rights, but just in their daily interactions. and so yes, it's wondersful that so many people have come to selma, from across the globe, i'm sure but for politicians to hammer home how important the voting rights act is but we need to keep marching and make sure that this isn't just a once-a-year thing. i believe reverend glasgow in alabama has been doing a lot of this w