Editor's note: If you'd like to help Erika cover the cost of some of her medical bills, her friends have established the Erika Brannock Fund to collect donations.
Erika Brannock, a survivor of the Boston Marathon bombing, anxiously purses her lips.
Her eyes jump and she is quick to smile and laugh.
This is what someone looks like waiting to meet the person, a stranger, who she believes saved her life.
"I told my cousin last night that it's kind of like the night before Christmas, where you're so excited, but nervous at the same time and you can't sleep," Brannock told CNN's AC360 on Wednesday.
Brannock is about to meet Amanda North, a woman who took her hand and did not let go.
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