Anchored by Jake Tapper, The Lead airs at 4 p.m. ET on CNN.
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The Lead's Jake Tapper talks to CNN's Deborah Feyerick about a video of slain bombing suspect Tamerlan Tsarnaev. Intelligence sources tell CNN they believe Tamerlan was the ring leader in the deadly Boston terrorist attack. Tamerlan's younger brother, Dzhokhar Tsarnaev, 19, remains on the run at time of writing.