>> what they want to do the most is they want to have a large airplane blow up in flight. >> reporter: isis has already taken credit for blowing up a russian airliner two years ago, killing more than 200 people, claiming the bomb was hidden in a soft drink can. the white house national security adviser says that justifies president trump's disclosures to the russians. >> this was the context of the conversation in which it was wholly appropriate to share what the threat was as a basis for common action and coordination. >> reporter: but many in the counterterrorism community say what the president did was a mistake. >> russia is not part of the isis coalition. they are not our partner. >> and brian ross with us now. brian reported there that it's believed it was israel, our ally, who gave us that information. lot of people are pointing to the fact if this classified