ICIJ members in every region told of rising attacks, intimidation, government pressure, restrictions, lawsuits and penalties in the past year, as well as concerns arising from changes in media ownership.
Stories by investigative journalist Arturo Torres and his team at Código Vidrio have inspired a national campaign against misinformation in Ecuador.
The formal request from four Republicans suggests that links between Russia and social media companies may be a potential factor in new U.S. sanctions.
Part one of three: Twitter streams can rapidly turn into floods - here's how to keep your timeline relevant and under control so you don't miss important updates.