Only on the "CBS This Morning" podcast, retired General David Petraeus joins "60 Minutes" correspondent John Dickerson to discuss the state of ISIS in the wake of the killing this week of its longtime leader Abu Bakr al-Baghdadi. Petraeus, who previously commanded coalition forces in Iraq and Afghanistan, emphasizes the U.S. must remain committed to focusing on the "enduring defeat of the Islamic State," not just one defeat or one senior leader. When asked about the president's repeated promise to end what he calls America's "endless wars," Petraeus warned that you can't completely get out of endless wars because you end up going back into them. Petraeus also talked about other foreign policy issues including the U.S relationship with China, how to deal with Russia and the importance of having allies.