Retired U.S. Army General David Petraeus was the commander of U.S. forces in Afghanistan, and he joins us now. Welcome to the program once again.
DAVID PETRAEUS: Great to be with you, Robert.
SIEGEL: We’re going to hear tonight the latest of many presidential speeches about Afghanistan. And I wonder first if you had to explain to Americans what the U.S. mission in Afghanistan is after all these years, what would you tell us?
PETRAEUS: Well, that’s a great question and exactly where we need to begin. We should remember at a moment like this why we went to Afghanistan, why we stayed and why we need to continue to stay.