new dimension. that's the key. a longtime reluctant neighbor squarely in the fight. >> nick p paton walsh reporting for us. >> i want to bring in retired lieutenant rick francona. how realistic is it to seek to clear the isis threat out of syria? is it a game-changer? >> the involvement of turkey at this level is a game-changer. everybody on the coalition side is really pleased the turks are now involved. many would say finally involved. we've been waiting for this for a long time. the turks have the second largest army in nato. they are very capable armed forces and much is deployed down to the syrian iraqi border. so, it is a game-changer as nick said. do they have the capability to go into northern syria and create this buffer zone? yes, they have the capability if they have the political will to do it. but i think we need to be a