have emboldened assad this time around giving him a sense that the united states wasn't fully committed to this fight. we're waiting to see what exactly president trump is going to do here, but there are no really great choices for him given what he has said himself in the last several days and also that assad doesn't seem to be responding for the last year. >> also of note here, this new attack on syria comes almost exactly one year after president trump launched 50 -- last time president trump said he responded with military action because the chemical attack crossed a lot of lines for him. so how might the u.s. respond this time? homeland security advisor tom bossert says nothing is off the table. >> is it possible there will be another missile attack? >> i wouldn't take anything off