ET looks back at Paul Walker's shocking death in 2013, and how his fiery car wreck changed the fate of the 'Fast and Furious' saga. At the crash site, an emotional Vin Diesel addressed the crowd of mourning fans, who created makeshift memorials around the spot where his longtime co-star died at 40 years old. Two days earlier, Paul was supporting his charity’s event in Valencia, California, when he took a ride with friend Roger Rodas in a 2005 Porsche Carrera GT. After a few minutes, the car violently spun out before smashing into a tree, igniting the Porsche into a fireball that made it impossible to identify their bodies at the scene. ET tracked ‘Furious 7’s response behind the scenes, including: how Paul’s brothers, Caleb and Cody, and CGI helped finish his incomplete performance, Wiz Khalifa and Charlie Puth’s ‘See You Again’ song tribute, and Brian O’Conner’s journey turning away from Dominic Torreto’s on-screen adventures.