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Apr 29, 2013 3:42 AM by Lacey Steele

Latest on Boston bombings investigation

New questions in the Boston bombings investigation about the path the suspects may have taken.

A key focus for investigators centers on Tamerlan Tsarnaev's visit to Dagestan in 2012, and what he did during his six-month stay.

Authorities say they are weighing Russian reports on what they learned about Tamerlan while he was visiting family.

The big question for lawmakers: whether Tamerlan received training during his trip.

Several former counter-terrorism officials say investigators are leaning toward a theory that the two suspects did not have training and acted alone.

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