Plot: NFL Hall of Famer and “Good Morning America” co-host Michael Strahan discusses his new HBO docuseries “The Cost of Winning. ” Plus, stories of resilience, including MMA fighter Vince Murdock on his remarkable return to the UFC cage a year after his life threatening brain surgery; a high school senior whose strength inspired thousands after losing her legs in a car accident; and a 19-year-old designer whose PRIDE-themed NASCAR design of Jimmie Johnson’s race car went viral