ABC News' Linsey Davis sits down with "Avatar" mastermind James Cameron and the stars of the blockbuster franchise to discuss his latest chapter and the real-world issues woven into the story. ––– Subscribe to ABC News on YouTube: https://abcnews.visitlink.me/59aJ1G ABC News is your daily source of breaking national and world news, exclusive interviews and 24/7 live streaming coverage. Download the ABC News app for the latest headlines and alerts: https://abcnews.go.com/devices Watch 24/7