Last Boston bombing victim leaves hospital

(CBS News) BOSTON - Seven weeks after the Boston marathon bombings, all of the wounded are now out of the hospital.

Erika Brannock, a 29-year-old pre-school teacher from Towson, Md., was released Monday. Both she and her sister were hurt in the attack.

This photo of Brannock's sister, Nicole Gross, taken just moments after the first bomb went off, has become an iconic image of the attack.

She and Erika had come to the marathon to cheer on their 57-year-old mother Carol Downing.

"I remember being flown back," Gross said. "And there was instant silence. And then I was scared for dear life that another bomb was going to go off. And that that's how I was going to die."

"I just looked straight up and had a conversation with God and I said, ' I'm not going, I'm not done yet,'" Brannock said.

Gross, a runner herself, trained her mother for the race.

"I was almost at the finish line," Downing said, "then we heard there was a bombing and I tried to text my kids and didn't get an answer. And I thought it was just sheer panic for me then."

With the help of strangers, browning was able to locate Gross at Brigham and Women's Hospital. She had broken both legs and sustained hearing loss.

It wasn't until 9 p.m. that she found her younger daughter Erika at Beth Israel Hospital. Her left leg had been partially amputated.

"I went into the room and I just didn't even recognize her," Downing said.

Brannock faces months of rehabilitation back home in Towson, Md., before she'll be able to walk with the aid of a prosthetic leg. After weeks of rehab, Gross is back home in Charlotte and walking again.

Brannock said she feels angry.

"I think one of the hardest things for me was when they actually brought the second bomber into the hospital," she said. "I thought he was gonna blow the hospital up. And I just remember being angry that somebody could do this and make such a happy occasion so horrific."

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The sisters said the bombing has only made their relationship stronger.

"We were right on top of each other when it happened when the bomb went off," Gross said. "And we're going to be side by side no matter where we are forever."

Proving that there are some things a bomb can't destroy.