In a 60 Minutes interview scheduled to air on Sunday, Republican Sen. Scott Brown reveals to CBS's Lesley Stahl that he was sexually abused by a camp counselor when he was in fourth grade. He has kept the secret for nearly 40 years and details the experience in his new autobiography, Against All Odds: My Life of Hardship, Fast Breaks, and Second Chances, due out next week. "When people find people like me at that young vulnerable age who are basically lost," Brown tells Stahl in the interview. "the thing that they have over you is they make you believe that no one will believe you." Brown rose to national prominence last year, when he was elected to the Massachusetts seat Democratic Sen. Ted Kennedy had held since 1962.