. >> we are joined by retired affairs colonel cedric layton. as we know, the saudis have 150,000 troops poised at the border. most importantly do you think it will work? >> well, i think it is possible randall that they will in fact do something on the ground. air power has a way of softening up things first and then, there is a need to come in and to do things on the ground, in order to effect real political change. i think they are going to run into some significant difficulties though. the northern and western parts of yemen are incredibly mountainous and of course that's houthi territory and the houthis know this like the back of their hand and they are going to do everything in their power to make sure that it would be a very long and difficult campaign for the saudis and the egyptians. >> egypt has gone into yemen before with disastrous results. do you think it's a chance for history to repeat itself? >> hopefully for the jean-baptiste it is a possibility. , they will have studied what happened in 1960s when 150,000 egyptians came under g