Sits down with the bbc to talk about his latest work in Washington A Sprawling tribute to those who fight for freedom. I am katty kay in washington Christian Fraser is in london. The pentagon says the intelligence is compelling it has identified planes and also the hangar in which it says the Syrian Government may be preparing another Chemical Attack. The white house said to President Assad he will pay a heavy price if the weapons are used. In april, a Sarin Gas Attack on the rebel held town of Khan Sheikhun killed at least 87 people, many of them were children. The attack was launched from this same base. Today the syrian president Bashar Al Assad denied any new preparations were under way. And perhaps in defiance of that us threat, he paid a visit to a russian airbase in the west of the country even climbing into the cockpit of this sukhoi fighter jet. Not the image of a man cowed by american threats. A short while ago the Us Ambassador to the un, nikki haley issued this statement ab