Khizr Khan on why public service is the root of patriotism

"When you lose a child, it creates a hole in your heart...that is never filled," says Khizr Khan, the Gold Star father who gave a captivating speech at the 2016 Democratic National Convention....

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JUDY WOODRUFF: Finally, in another of our Brief But Spectacular series, we hear fromKhizr Khan.He's the Gold Star father who gave a speech at the 2016 Democratic National Convention,later called out for criticism by then candidate Donald Trump.Mr. Khan has more recently been fund-raising for the Democratic Party.Tonight, he tells us a about his son, Captain Humayun Khan, and the legacy he left behind.Khizr Khan's book, "An American Family: A Memoir of Hope and Sacrifice," was releasedthis week.KHIZR KHAN, Author, "An American Family: A Memoir of Hope and Sacrifice": I would takemy kids with our guests sometimes to Jefferson Memorial in Washington, D.C., and I wouldask them to read the inscription on the wall.And the...