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b'Colin Powell, who in four decades of public service helped shape U.S. national security, died on Monday. He was 84.\\n\\nDespite a stellar career, Mr. Powell had expressed a fear that he would be remembered for a single event: his role in leading his country to war in Iraq.\\n\\nWe look back on the achievements and setbacks of a trailblazing life. \\n\\nGuest: Robert Draper, writer for The New York Times Magazine and author of \\u201cTo Start a War: How the Bush Administration Took America into Iraq.\\u201d'