The Rachel Maddow Show 09/10/15

Al-Qaeda leader rejects ISIS leader 'caliph' claim

Rachel Maddow reports on a new round of propaganda from terrorist organizations ISIS and Al-Qaeda and points out a new message from Al-Qaeda leader Ayman al-Zawahiri rejecting the authority of ISIS leader Abu Bakr al-Baghdadi, putting the two groups at odds. ... more Duration: {{video.duration.momentjs}}