Apr 29, 2013 3:42 AM by Lacey Steele
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.