When Brad Pitt and Angelina Jolie boarded a flight from Nice to Los Angeles last September, neither of them could have realized the trip would mark the beginning of one of the nastiest splits in Hollywood history. We now know the fated journey, during which Brad got into a disagreement with his 15-year-old son Maddox, would lead to an explosive FBI investigation into what really happened on the plane. Less than a year earlier the couple had posed together on the red carpet while promoting their latest movie together, By the Sea—ironically a film about the breakdown of a marriage. Despite the depressing subject matter, Brad and Angelina acted like two people deeply in love as they held hands and looked adoringly into one another's eyes while photographers joyfully snapped away. Their romance had a rocky beginning, due to the perceived overlap with Brad's previous marriage to Jennifer Aniston. Yet it didn't take long for Brangelina to become the hottest couple in...