Gen. Stanley McChrystal was the top commander of American and international forces in Afghanistan in 2009 when his career was cut short. He resigned after an article in Rolling Stone quoted him and his aides making candid, yet disparaging remarks about President Obama and Vice President Biden. McChrystal is now the author of a new book, "On Character: Choices That Define a Life." PBS News Hour's Amna Nawaz spoke to McChrystal about the book and the current leadership at the Pentagon. | PBS NewsH