The heckling came at the end of former Secretary of State Hillary Clinton's speech at the National Constitution Center in Philadelphia which she gave in acceptance for the 2013 Liberty Medal, Tuesday night. In her speech, Hillary kept it bland, largely staying away from controversial issues: Clinton paid lip service to the pressing questions of the day: how the United States should respond to the use of chemical weapons -- the question at stake in Syria -- and how it should balance the need for both liberty and security. But she did not offer any concrete answer on these highly...