Special edition of "GMA3" co-hosted by ABC News chief health and medical correspondent Dr. Jennifer Ashton and celebrity chef Jamika Pessoa;health expert Dan Buettner; National Fire Protection Association President and CEO Jim Pauley on firework safety; board-certified veterinary surgeon Dr. Courtney A. Campbell on summer pet safety; Team Survivor Northwest executive director Jennefer Boyer and cancer survivor Barbara Travers; celebrity chef Jamika Pessoa with a cooking demonstration.