your search history is never tracked, so it can't be shared. and when you leave search, duckduckgo helps keep companies from watching you as you brows. join tens of millions of people making the easy switch by downloading the app today. duckduckgo, privacy simplified. (upbeat music) >> we have a full house for the night cap. mark meredith in d.c. the first time. tonight's topic you might want to take off shoes before walking around the house because studies show you might have focal bacteria. mark do you take your shoes off before you walk in. >> absolutely not unless my wife is yelling to take them off. i can understand with a special carpet but i'm amazed with