theresa may said, use the word russia that russia was very likely in theresa's language to be behind the attack. >> theresa may said two things. it's almost certainly russia, what we don't know whether this was a directed operation out of the kremlin or whether something went awry and this radioactive material that poisoned 200 people in the city of salisbury, whether that was a rogue operation or something that went crazy. that means it's russia one way or the other. and it's an act of war. and we have something called article v in the nato treaty which on likbliges us. but something an attack that injures english nationals is an act of war.