. >> reporter: mike leiter is stepping down, he says, because it's good for the agency to have new leadershipd a half years running at 100% capacity 24 hours a day, he is ready to slow down a bit. jeanne meserve, cnn, washington. >>> a disaster off of mexico's coast with american tourists among the dead and missing. details of the search for survivors. plus, enough treasure to make indiana jones jealous. details of a multi-billion dollar treasure discovered under a temple. re my sunshine ♪ ♪ my only sunshine ♪ you makes me happy ♪ when skies are grey ♪ you'll never know, dear ♪ how much i love you ♪ please don't take my sunshine away ♪ [ male announcer ] as long as there are babies, they'll be chevy's to bring them home. ♪ it's me? alright emma, i know it's not your favorite but it's time for your medicine, okay? you ready? one, two, three. [ both ] ♪ emma, emma bo-bemma ♪ banana-fana-fo-femma ♪ fee-fi-fo-femma ♪ em-ma very good sweety, how do you feel? good. yeah? you did a really good job, okay? let's go back to drawing. >>> white house south lawn there. the president of the united states h