martha despite dialing back the president s urgent timeline, this still looks eminent? it does, david. they may not be doing this as fast as last year, but president trump is not going to let assad go unpunished for such a horrific crime, not to mention for doing again exactly what he was warned not to do. david. martha raddatz with us all week. martha, thank you. as the u.s. prepares for a possible military assault after the suspected chemical weapons attack, there s word from russia. the russians say the chemical attack was an elaborate set up. tonight what the russians claim really happened. abc s james longman in beirut. reporter: russia has consistently claimed these horrific images of the suspected chemical attack were staged. now they re going even further. the defense ministry today showing footage of two men, it claims, are paramedics who saw a group run into that hospital with video cameras and start screaming about a chemical attack. they say the group whipped up a