Royal Dutch Shell tops the Fortune Global 500, ending Wal-Mart's two-year winning streak.
|World Series ticket prices for Cubs-Indians matchup are already staggering|
|AT&T CEO pledges journalistic independence for CNN|
|American vigilante hacker The Jester defaces Russian government website|
|A third of pro-Trump tweets are generated by bots|
|Chinese firm acknowledges inadvertent role in cyberattack|