Recent Suffolk University graduate Kaitlynn Cates went to the Boston Marathon finish line with her friend Leo Fonseca to watch their friends finish. When the first bomb went off, she fell to the ground, and Fonseca got on top of her to protect her. After the second explosion, he carried her to his car and applied a tourniquet to her leg. She was treated at MGH and lost part of her calf, including muscle, which is expected to grow back. She credits him with saving her life.