>> reporter: but instead of shark cages, a team of kayakers protect her. under each of their boats an electronic shark shield. it creates a 30-foot bubble around her of electric pulses to repel sharks. >> i'll admit to you i feel afraid. >> reporter: still, fear, at 61, never looked so fearless. sharyn alfonsi, abc news, new york. from one pioneer to another, dr. bernadine healy,y,he first woman to lead the national institutes of health, has died. she led the way in changing clinical trials. insisting they should consider the unique ways medicine affects women. dr. healy, who also once led the red cross, was 67. and coming up, the new way to save big. ♪