hd-5. no breakfast, cheeseburger, let's go. let's go. we have to have turnover. what do you want? >> i don't, it's too early for a cheeseburger. look! >> cheeseburger, cheeseburger, cheeseburger. >> it is never too early for a cheeseburger. >> not at all. that iconic "saturday night live" sketch starring john and robert kline and a very young bill murray back >> as we know, working this shift, it's never too early for a cheeseburger, and today, on national double cheeseburger day, we might be the first to celebrate with the country's most popular burger joint. >> abc's will gans takes us to the boogie down bronx for insomniac kitchen. >> reporter: hey, insomniacs, i know harold and kumar did it first, but today, we're going to when preparing the perfect double cheeseburger, step one, you can't act the part. you have to look the part. ? i am here with the general manager of this white castle, diane lekovic. did i say it right? >> yes, you did. perfect. >> and you have hired me for the day, unofficially. >> yes, i have. >> but first things first. i want a tour of the lay of the land, if you will, is that all right? >> no problem. >> all right, let's do it. i'm usually on the other side of the counter ordering. >> so when we have a customer approach, we welcome them. hi, welcome to white castle, how can i help you today? >> hello, and welcome to white castle. >> that's fine. we have the fryer section, salted, not salted, ready to go. this is famous r2d2, that's the fry products, the fish, the chicken, grilled chicken, eggs, well. ready to deliver to whomever you like. >> ready to deliver to, r 2 d 2. so famous. we love etta around here. >> famous in any white castle. >> legendary. >> legendary. give us the famous etta greeting, let's hear it. >> hi, welcome to white castle, my name is etta, you? >> friendly. >> very friendly. >> welcome to white castle, this is will, how can i help you? i'm going to grab you ketchup and tartar sauce, hang on, just a second. all right. here you go. thank you, come again. i'm giving them an extra one. >> have a great day. >> didn't see that one coming. >> here's your order. sorry for the wait. thanks so much for coming to white castle. it's national double cheeseburger day, let's do this thing. >> yes, let's do this thing. yes. there you go. take off one of the tops. >> this, i can handle. boom. >> take two slices of cheese. >> one goes here. >> yes. >> one goes here. now i get my pickles. >> yes. two pickles. >> they go here. >> yes. >> ketchup. >> yes. okay. all right. go ahead. >> i take this? >> no, no. >> no, no, no. >> this always stays right here. >> okay. >> okay? >> now lift it up? >> yes. one hand, the other hand. >> this way? >> yes. in there. >> okay. >> okay. >> that's pretty good looking. now should we do a taste test? ? wait, let's do this together. ? ? [laughter] >> just going to get in there. >> dig in. >> oh, oh. >> oh, wow. >> you're fake eating. >> i'm fake eating. >> the onions are like flavor crystals exploding in your mouth. >> oh, my god. >> put it in your mouth. what are you waiting for? >> i wonder how many food segments they're going to make you do. >> this is fake eating. oh, man. >> you demolished the burger. >> i'm not eating it. sorry. she's shocked. no, i'm just playing with it. >> demolishing it. >> a lot of places are participating, hardees nathan's. >> happy national cheeseburger day. >> i'll eat it, ready? ? it. here, ready? eat it, ready? flr it. here, ready? it. here, ready? t. here, ready? so consider an aarp medicare supplement insurance plan, insured by unitedhealthcare insurance company. like all standardized medicare supplement insurance plans, they could save you in out-of-pocket medical costs. call today to request a free decision guide. you'll be able to visit any doctor or hospital that accepts medicare patients... plus, there are no networks, and virtually no referrals needed. join the millions who have already enrolled in the only medicare supplement insurance plans endorsed by aarp... and provided by unitedhealthcare insurance company, which has over 30 years of experience behind it. with all the good years ahead, look for the experience and commitment to go the distance with you. introducing new k-y touch gel cr?me. for massage and intimacy. every touch, gently intensified. today you can do everything in just one click, even keep your toilet clean and fresh. introducing lysol click gel. click it in to enjoy clean freshness with every flush. lysol. ? ? the national mall in washington, d.c. has been the site of so many landmark moments in history, and yesterday, history was made there once again. >> president obama and his family got their sneak peek inside the national museum of african-american history and culture before its official opening. >> abc's serena marshall reports it's a project that's been more than a decade in the making. >> reporter: it's a journey through time and culture, the first museum dedicated entirely to black history, opening doors four years after construction began, but a museum of more than 100 years in the making. >> this was a dream of our civil war veterans, 1915, they asked >> reporter: the building design standing in stark contrast to the marble facade surrounding the national mall. >> and you walk in this gallery and you go from slavery to freedom. >> reporter: with artifacts of the slave cabin to a shawl owned by harriet tubman. one thing you won't find in this museum, personal artifacts from martin luther king jr.'s life, like his nobel peace prize or the bible president obama used in his second innaug ration. those items remain with his family. >> you will find the famous fedora worn by michael jackson, jackie the gloves worn by muhammad ali. the entire museum built around a segregation era railway car. >> the other feature we put in before the museum was built, this guard tower from a prison, and this is from louisiana. >> a prisoner plantation with a legacy of slavery. >> as i was walking through, i blocks and a few tears came down my face, and as i came up, i began to see contemporary protest photos and began to see president obama being inaugurated. >> reporter: student activist and protester stepped inside history, but also becoming part of it. >> you see black lives matter shirt, justice for trayvon. what's it mean to you to see part of your fight represented in this museum? >> this also reminds me that my community of ferguson just wanted to mourn. we protest because we believe we can create a perfect union. >> reporter: a union of culture later this month. serena marshall, abc news, washington. >> and the museum opens on september 24th. >> it's a fascinating museum, they actually have a slave ship from off the coast of africa and shipped it all the way over here and moved it in. >> wow. >> the museum is eight stories, cost $540 million to build. >> oprah's a big contributor to it as well. that's the news for this half hour. building an n-f-l stadium right here in las vegas. three key issues still stand in the way. we're breaking it all down this morning... :12-:17 everything she touched didn't work out...now hillary clinton donald trump gets interrupted while attacking hillary clinton on the campaign trail... you'll hear what that pastor has to say to the republican nominee... a decision on the proposed 1- stadium here in las vegas... could be just hours away. the stadium committee is set to meet this morning at u-n-l-v to discuss 3 key issues before a vote. the biggest issue... whether there will be a 39 percent limit on the public's contribution to the 65-thousand seat stadium. developers say they will not agree to that... saying they need 750 million dollars in public funding from the increased room tax--- even