Swimmer reveals how he conquered grueling, frigid 12-day mission on ‘Jaws’ anniversary to prove ‘sharks are not monsters’

"Jaws has shaped the narrative about sharks for the past 50 years as cold-blooded killers out to get us, and it's created a culture of fear around the world ... I felt that now was a once-in-a-generation opportunity to change a narrative," Lewis Pugh said.