bradley pointed out, for three years. >> i get that. but why is the u.s. directly involved in this fight? why does the u.s. see it as a necessary for our troops to be out there? >> well, i mean unfortunately it's become sort of part of this almost soviet-era style proxy war between the united states and iran. so because the houthis have gotten closer and closer to iran and to tehran and hezbollah, the u.s. feels it's sort of incumbent on itself to support the effort to fight it. you have a very poor country in yemen that doesn't have a lot of resources. one thing that's very important about it is that it abuts a very narrow stretch of water through which a very large chunk of the world's oil supplies go through. and so in a sense, it's a war over a very important strategic piece of territory in the middle east that the u.s. feels is