This show is made up entirely of amateur images. We've seen time and time again how images captured by ordinary citizens then uploaded onto the Web can change history, or at least shift the balance of power. This week, we take a look back at some of those moments.
Story 1: Brazil
We begin today in Brazil, with the mass demonstrations that seem to have taken everyone by surprise - including the police. They began as a protest in one city over a hike in bus fares, and spread across the nation. There's been an outpouring of anger over all kinds of issues, but mostly how the government should spend public money - on stadiums for the World Cup, or on health or education for ordinary Brazilians. Our Observer Pedro was in Rio one night when things turned ugly.
Story 2: Mali
In many countries of the world, if you drive a car, you make sure you're carrying some cash. That's because traffic police in many countries are notorious for taking bribes. Our next Observer lives in Mali, in West Africa. He admits he did something wrong, but says it's a shame he got away with it by paying a bribe.
Story 3: World
Now for our weekly roundup of other reports and images sent in by our Observers.
First stop Tunisia, to the basement of a villa in the capital. It was the headquarters for internet censorship under President Ben Ali. But the country's new rulers have opened it up - to hackers, no less. They are going through the machines systematically, trying to learn what they can about how the former regime blocked web sites that it deemed undesirable. The hackers have nicknamed the place "The 404 lab" - a reference to the 404 errors Tunisian Web users used to get so often.
Now to China, the city of Wuhan. This man is a member of the chengguan, city police whose main job is keeping illegal street vendors off the streets. But then an embarrassing photo was posted on the Web: the same man, selling teacups himself, right from the street. City officials held a press conference to explain that in fact the officer was so good at his job that he had been chosen for an immersion course, to try to better understand how street vendors think and operate. Chinese web users aren't buying it, and think he was just trying to supplement his salary.
Finally some advice: if you're thinking of sending some fine china to Novosibirsk, in Siberia, well, don't. Take a look at this video, shot in the city's train station. Bags, letters, parcels come flying out of a wagon. The postman inside the car is apparently more concerned about getting his job done than about what might be inside the precious packages. The Russian postal service has opened an investigation and promises to take appropriate measures.