>> he kept her calm. >> reporter: meanwhile, at the finish line carmen was looking for her family amid the chaos. you were just right there near the finish line. your own family, too, your husband, your kids, your three kids were there, too. >> they were at the finish waiting for me. i was terrified my family was all gone. everyone that i loved was there. >> reporter: carmen finally found them and then rushed to the hospital to be with her sister celeste, and kevin. celeste's injuries were so severe, doctors had to amputate both of her legs below the knees. an hour after the bombing, the family discovered that sydney was being treated in the same hospital. but it wasn't until kevin spoke to her doctor that he realized how seriously sydney was injured. >> so i asked in no uncertain terms because i needed to know, just myself, what's your opinion? how bad was this? and he said this was a mortal