The forces that propelled Aramco's growth from a single well to the biggest oil producer in the world are changing underfoot. Now that the company has sold shares, can it sustain the kind of growth needed to keep investors happy? WSJ explains. Photo: John Moore/AP More from the Wall Street Journal: Visit WSJ.com: http://www.wsj.com Visit the WSJ Video Center: https://wsj.com/video On Facebook: https://www.facebook.com/pg/wsj/videos/ On Twitter: https://twitter.com/WSJ On Snapchat: https://on.wsj.com/2ratjSM #WSJ #Aramco #Explainer