During the cease-fire between rebels and the Syrian government, an aide truck was attacked and destroyed, killing 20 civilians. Humanitarian aide was a huge reason for the cease-fire, but it seems that the truce was never going to hold up. The cease-fire wasn't negotiated directly between the Syrian government and the rebels. Instead, the US and Russia did all the talking, and now they're blaming each other for the attack. Additionally, the US and Russia did not convince all of the warring groups to agree to this deal. Furthermore, the war in Syria is so dispersed and complex, with so many different groups involved, that a cease-fire between all parties in all locations was unreasonable.