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May 15: Nightly News Wednesday broadcast
IRS challenges public's confidence in government; Holder promises national IRS probe; White House attempts to end Benghazi dispute with new documents; Army sexual assault reveals culture of silence; Does ovarian cancer risk necessitate ovary removal?; Immunotherapy targets cancer cells with remarkable results; Breathtaking helmet-cam view of Washington Monument; Mount Everest’s glaciers are melting; Prince Harry plays polo match for charity; Silence! Scientists are listening to the universe.