more painful for greece. it will be the first time in history that the country will move from the second most important in the world to something that we have zero confidence. >> reporter: saying ghb to a weak member won't prevent the stronger ones from leaving. soon the uk will host its own referendum on membership, which could be more damaging than a grexit would ever be. cnn, london. live pictures here where we are looking at events there in srebrenica. the representative of the president of iran is speaking. let's listen in. >> the srebrenica genocide was a stigma attached to the history of humanity in the 20th century.