In a furious speech, US Secretary of State John Kerry said that all air forces must be grounded in N. Syria as the only way to give the truce a chance and enable humanitarian aid to get through. Addressing the UN Security Council meeting on the Syrian crisis Wednesday, he called on all countries to cease support to any groups opposed to a truce and negotiations, calling them "spoilers." There is no other choice, he said. The fate of Syria hangs by a threat. He lambasted Russia over the air attack on an international aid convoy to Aleppo that killed 28 air workers. It was suggested that only the Russian air force is capable of operations by night. Kerry said that listening to the Russian foreign minister made him feel as though he was in a “parallel universe.” He was responding to Sergei Lavrov’s demand for a thorough investigation into the charge that the aid convoy bombed included a pick-up truck with weapons for the rebels in Aleppo.