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    Jon Stewart fights to help veterans exposed to burn pits (Part 1)

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Jon Stewart fights to help veterans exposed to burn pits (Part 1)

04:10

A growing number of veterans say they have developed serious and sometimes fatal diseases after exposure to burn pits at overseas bases. Jon Stewart, who advocated for first responders after September 11, is fighting for expanded health care access for veterans. He talks to Lester Holt about the issue.