Intellectual Takedowns; Former White House Press Sec & Why Men Fight

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Activist and scholar Cornel West joined hundreds more in Union Square to protest recent police brutality.

Georgetown professor and author Michael Eric Dyson talks about the "scholarly decline" of his former friend Cornel West. Plus: career advice from the former White House press secretary Dana Perino; one theory as to why men fight -- and why we like to watch; the contrarian views of Princeton physics professor Freeman Dyson and for Earth Day, call in to share the ways you stay connected to nature in the big city.