we now know how big of an audience david letterman got last night for his final signoff, his farewell. nearly 14 million of you watched. it was letterman s biggest audience since 1994 and the over the years he has had a lot of regulars on as guests like his kid scientists. the most popular segment. he took a moment last night to remember their contributions over the years. i want you to hold it down this end like this. okay. you re down there. why don t you do it? [ laughter ] it s not dangerous. okay. normally. [ laughter ] when those things come off they re going to be so beautiful you won t believe it. thank you. [ applause ] i was supposed to have braces when i was a kid but i didn t. my parents used the money for a wetbar downstairs. [ laughter ] this is a fire extinguisher full of carbon dioxide. so uh-huh
and find the aarp medicare supplement plan to go the distance with you. go long. the tragic plane crash in the alps has been the top story around the world this week and as we learn more about what caused the crash possibly the story is more troubling. sure does. we have seen more scandals taking place. the 2016 presidential race takes its first steps, president obama talks brain power with cape clad kid scientists. and the end of an era for directioners. it is in our friday rewind. this is a tragic day for lufthansa airlines. it s really a dark day in our history. translator: we heard a very loud sound, like dynamite. at this time we can confirm the deaths of yvonne and emily selke.
brainstorm session yourself? i have had a couple of brainstorming sessions, but i didn t come up with anything this good. so you guys are better brainstormers than i am. what did you do? i came up with things like health care. yeah, it turned out okay. zayn said after five years he is leaving to focus on his true passion which is not being shrieked at by a hoard of 12-year-old girls every time he opens a door. those kid scientists are so cute i have to say. my favorite moment from the week. not the zayn leaving. that was up there but the super woman girls and president obama was pretty cool. one directioners are trying to buy the band away from management. do they think they can buy people? interesting. i didn t know who he was until i started to anchor the show. see you learn a lot in the skinny. announcer: this is abc s world news now, informing insomniacs for two decades.