Alabama teenager Lulu Gribbin, who lost a leg and arm from a shark bite, spoke in an ABC News exclusive interview about the horrifying incident along with her future and ways she plans to help others; ABC News' Dr. Tara Narula explains new research showing popular GLP-1 weight loss drugs may benefit not only adults, but also children and teens; Eva Longoria talks 'Necaxa;' and more on ABC’s Good Morning America.

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