. >> one of yahoo shareholders issued a mate up, fire scott thomps or or else.ahoo is investigating and where urging employees to stay focused. in memo obtained, he says i'm doing what you are doing, staying fo customers our customs and moving yahoo forward fast. >> dan: coming up next, the secret service scandal. the woman at the center of it all tells her side what happened that night in colombia. >> summer job reinvented. teams are becoming internet entrepreneurs. >> and mass for the ages, 81-year-old billionaire and a prodigy prodigy. >> coming up next on "nightline," it started as a challenge to re-ignite mir tal romance with a solid week of love making and ended surprisingly. >> he got rich by breaking all the rules. we'll hang out with mark cuban. >> we'll continue in 60 seconds. dinner's ready. [ female announcer ] hamburger helper stroganoff. beefy. creamy. stroganoffy. helpers. forty dishes, all delicious. those five food groups sound a whole lot better when you put them in a taco shell instead of a pyramid. old el paso. when you gotta have mexican. ♪