Gen. Stanley McChrystal on 'Task' of Afghanistan
Video duration: 12:05
As commander of U.S. forces in Afghanistan, retired Gen. Stanley McChrystal butted heads with President Obama over how many U.S. troops should be committed to war efforts. Publicity on that disagreement ultimately led to his resignation in 2010. Margaret Warner talks to McChrystal and his new memoir, "My Share of the Task."