a man risks his own life when he dives into the water to free a whale trapped in a fishing net. >> that was an extremely intimidating and potentially dangerous place to be working. >> conservationist michael fishbach is the codirector of the great whale conservancy. he travels to mexico sea of cortez for two months every winter to photograph and observe some of the largest animals in the world, blue, fin, and humpback whales. on february 14th, 2011, he's out on the water with his wife, heather watrous, 5-year-old son, galen, and friends, george and whitney brazington. they're headed for a beach when he sees something in the distance. >> it looked to me sort of like part of a tree trunk floating in the desert where there are no large tree trunks ever floating in the water. and as we approached very, very slowly at that point, i could