Anchored by Jake Tapper, The Lead airs at 4 p.m. ET on CNN.
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(CNN) – Police confirmed Monday afternoon that gunman Man Haron Monis seems to have acted alone in the Sydney siege, but there are clear signs that Islamic extremism may have motivated his actions.
Jake Tapper, CNN Terror Analyst Paul Cruickshank and Daveed Gartenstein-Ross, Senior Fellow at the Foundation for Defense of Democracies, discuss the difficulty of disrupting "lone-wolf" attacks.