The Hamas terrorist attack on Oct. 7 that killed more than 1,400 Israelis drew comparisons to the al-Qaeda attacks on New York and Washington on Sept. 11, 2001. For some, the comparison is meant to justify massive military retaliation for a righteous cause after a stunning surprise attack. For others, the parallels offer a warning about the limits of military power and revenge. In this episode, CNN national security analyst and international terrorism expert Peter Bergen, the author of "The Rise and Fall of Osama bin Laden," discusses the similarities and differences between America's global war on terrorism and Israel's war against Hamas in Gaza.