Walid Moualem, the Syrian foreign minister, has ‘categorically’ denied that his country was using chemical weapons on its own people. At a press conference held in Syrian capital Damascus on Tuesday, he challenged the world to provide evidence that the Syrian government was behind last week’s alleged chemical weapons attack in eastern Ghouta, a suburb of the capital Damascus. The Syrian foreign minister accused John Kerry, his American counterpart, of lying and disregarding the work of UN inspectors when he stated there was