Since 2012, more than a dozen teenagers have killed themselves after being bullied on the Latvian social network.
Here's how to cover the issue correctly.
Cantlie is known to have previously been beaten and tortured by Islamic State.
The FBI is now investigating bomb threats sent to the Game Developers Choice Awards in March.
Since June, Peter Sunde has been serving time for copyright violations linked to torrent hub the Pirate Bay.
Two men brutally assaulted in Philadelphia have Twitter on their side.