players have had to say over the course of this week with commission mr speaker it is now clear that mr script al and his daughter were poisoned with a military grade nerve agent of the type developed by russia this is part of a group of nerve agents known as noted. based on the positive identification of this chemical agent by world leading experts at the defense science and technology to poetry at porton down our knowledge that russia has previously produced this agent and would still be capable of doing so. think i. think something like that it's going to get going thank. goodness we got the facts straight and we're going to be speaking with the british today we're going to reset make today as we get the facts straight if we agree with that we will get them right whatever is a big but i had that bugger all agree subducted later will be asking commentators both domestic and international with exactly this escalating confrontation is likely to lead but first over to alex for discussion as someone who's been on the receiving end of many human rights abuses of touch all shot the problems in the be

al-jazeera live from my headquarters here and also coming up. there is no alternative conclusion other than that the russian state was culpable for the attempted murder of mr script and his daughter britain is to expel twenty three russian diplomats as part of its response to the poisoning of a former double agent and his daughter. sold into slavery the result for some people seeking sanctuary in europe after an e.u. libya deal. and the world renowned scientist stephen hawking who helped unlock the mysteries of the universe has died at the age of seventy six. our top story developing story for you this thousands of students and teachers across the u.s. are about to walk out of their classrooms to raise awareness of gun violence the walkout will last for seventeen minutes to pay tribute to the seventeen people killed in the florida high school mass shooting exactly a month ago school districts across the country. threatened to punish those who take part in the rally angering parents who say their children's right to protest is being violated organizers say they hope the walkout can help pressure congress to pass gun control legislation let's take you live now to p