Syria attack leaves 100 dead
28 May 2012 Last updated at 18:09 BST
In one of the latests attacks in Syria more than 100 people died in the town of Hola.
It follows a year of fighting between government troops and people who are unhappy with how things are being run.
There had been hopes that a peace deal between the two could be struck.
Now World leaders are desperately trying to come up with a new plan to prevent more killing.