CNN — Six weeks after the bombings at the Boston Marathon, life on Boylston Street is getting back to normal,
Survivors are moving ahead, even though they carry reminders of the attacks with them,
And investigators are working to answer the many questions surrounding the attack.
Federal investigators continue to focus on Tamerlan Tsarnaev's extended visit to Dagestan last year.
Tsarnaev had told friends he couldn't relate to American culture.
Did he spend six months there to reconnect with his homeland or was he trying to make contact with Islamic militant groups?
We do know he visited this mosque, so did Mahmud Mansur Nidal.
Nidal later joined a militant group and was killed in a firefight with Russian forces, it is still unknown, whether Tsarnaev met Nidal or any other militant.
Investigators believe he and his younger brother Dzhokhar, who awaits his next court appearance in a federal prison, may have acted as so-called lone wolves.
But, they are still investigating Tamerlan Tsarnaev's contacts overseas and at home.
Tamerlan's wife, Katherine Russell, according to her attorney, continues to cooperate with investigators.
He says, "She understands the government's position and why they want information."
But, the constant questioning may be taking it's toll.
"It's very difficult, she is a young woman trying to bring up her baby without a dad and dealing with all this, the sooner all this is over the better."
The bombing killed three people and injured 275.
One remains hospitalized.
Some of those released are still in rehabilitation.