Snap of Clinton reading Pence email headline goes viral

(Reuters) - A photo of former presidential candidate Hillary Clinton glancing at a newspaper headline about U.S. Vice President Mike Pence using private email has gone viral on social media, with thousands of people commenting on it.Pence and others involved in the Republican presidential campaign last year criticized Clinton's use of a private email server during her time as U.S. Secretary of State.Clinton was on an airplane traveling from Boston to New York on Friday when a fellow passenger sn