The US and Russia came together to create a ceasefire in Syria. They need to have trust, leverage, and control (people giving it up) in order for the ceasefire to last. They need it so that aid groups could help the people that need it; bringing food and resources to those that need it. Terrorists could decide to interfere. If they do there's nothing anyone could do about it. For the innocent people in Syria I hope they don't until they can get enough to survive. I think unfortunately that the group will invade and break the ceasefire.