After Hamas militants launched a surprise attack on Israel on October 7, killing at least 1,000 and taking at least 150 hostages, and Israel declared war against Hamas and retaliated, photographs and videos of violence flooded out of the region and onto social media. Some of the images were posted by victims on the ground at the attacks. Some were reportedly seeded by Hamas, but others were years old, taken from conflict zones in other parts of the world, or even from a fictional video game. For the average internet user, knowing what information to trust online has never been more challenging.

As someone who has covered misinformation through dozens of major news events, I know that people flock to social media during a crisis for many reasons. Maybe it’s because the mainstream news doesn’t feel fast or immediate enough, or because the crisis has put them or someone close to them in harm’s way and they need help. Perhaps they want to see and share and say something that captures the reality of an important moment in time because they don’t know what else to do when the world is on fire. Misinformation and manipulation often spread for the same reasons, slipping into the feeds of those who believe it can’t hurt to share a startling video or gruesome photograph or call for aid, even if they’re not sure of the reliability of the source.

Israel and Hamas are at war. How did we get here? Vox answers the biggest questions.