In this week's Monday Briefing, MEI experts Marvin G. Weinbaum, Charles Lister, Hassan Mneimneh, and Paul Scham provide analysis on recent events including the killing of Afghan Taliban leader Mullah Akhtar Mansour, deadly blasts targeting regime-held territory in Syria, Iraq’s intra-Shiite feud, and Avigdor Lieberman's appointment as Israel's Defense Minister.