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Newly released photos of bombing suspects Dzhokhar Tsarnaev, left, and his older brother Tamerlan Tsarnaev, right.
Newly released photos of bombing suspects Dzhokhar Tsarnaev, left, and his older brother Tamerlan Tsarnaev, right.

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    Brain development's role in Boston attack

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Brain development's role in Boston attack

CNN's Jake Tapper talks to Sanjay Gupta about how brain development might have played a role in the Boston bombings.

Brain development's role in Boston attack

CNN's Jake Tapper talks to Sanjay Gupta about how brain development might have played a role in the Boston bombings.