​U.S. says BP can drill again, but why?

Tonight’s “Big Picture Rumble” discusses whether the U.S. should let BP drill again, the lawsuit against McDonalds over wage theft and Attorney General Eric Holder’s endorsement of reducing drug sentences. In tonight's “Conversations with Great Minds" Thom talks with Ploughshares Fund President Joe Cirincione, author of the new book “Nuclear Nightmares: Securing the World Before It Is Too Late.”