"This war did not have to be fought" says former Secretary of State John Kerry, who offers his expert perspective on Iran's nuclear program and the goals President Trump's team should pursue as they negotiate to end the war. #Colbert #Comedy #JohnKerry #Iran #PresidentTrump #EdSullivanTheater #StephenColbert #TheLateShow Subscribe To "The Late Show" Channel: http://bit.ly/ColbertYouTube Watch full episodes of "The Late Show": http://bit.ly/1Puei40 Listen to "The Late Show Pod Show" podcast: