Photos of then Secretary of State Hillary Clinton checking her email went viral in 2011. When Clinton joined Twitter last month, she chose a shot like this for her profile page, quickly racking up 650,000 followers.
13 Unforgettable Hillary Rodham Clinton Moments: Secretary of State, Candidate and First Lady (Photos)
A look at 10 of former First Lady's biggest moments in the White House, as Secretary of State and as Democractic candidate for president.