A leading weapons academic has claimed that the Khan Sheikhoun nerve agent attack in Syria was staged, raising questions about who was responsible. Theodore Postol, a professor emeritus at the Massachusetts Institute of Technology (MIT), issued a series of three reports in response to the White House's finding that Syrian President Bashar Al-Assad perpetrated the attack on 4 April. He concluded that the US government's report does not provide any "concrete" evidence that Assad was responsible, adding it was more likely that the attack was perpetrated by players on the ground. Postol said: "I have reviewed the [White House's] document...