Overview: Guests: Rev. Al Sharpton, CBS News correspondent Mo Rocca, journalist Zanny Minton Beddoes, commentator Reihan Salam, Ex ambassador to Croatia Peter Galbraith. Topics: Uprising in Syria, Iran acquiring nuclear weapons, the Republican primaries, Rick Santorum becoming front-runner, anti-contraception legislation, valentines day, gay marriage and proposition 8 in california, Clint Eastwood Superbowl advert, Republican dividing America.