United States Secretary of Defense Jim Mattis said the administration was still waiting for evidence of an alleged chemical weapons attack in Syria and expressed concern that military intervention could escalate out of control, during a hearing of the House Armed Services Committee in Washington D.C. on Thursday. «We're still looking for the actual evidence. The OPCW, the organisation for the... Еще chemical weapons convention, we're trying to get those inspectors in,» said Mattis. The defense secretary added that 'strategic' planning for military intervention would focus on, «how do we keep this from escalating out of control.» France, the US and UK have threatened to take action against the Syrian government after it allegedly used chemical weapons on civilians in Douma. Syria denies the allegations, calling them a 'fabrication'.