the new doritos locos tacos. at's a taco bell taco with a shell made out of doritos nacho cheese chips. joining us first on cnbc from ir vine, california, is greg creed and darren rovell is here to join us. darren, why don't you kick off the questions? >> greg, i got to ask you this, when you think of it, you say this is a partnership between you and doritos as people know pepsico used to own frito-lay and you have a pepsi relationship. how does this partnership work? is this an ad by a licensing deal? i know you're spending $75 million to roll this out, but how does the partnership actually work? >> well, the partnership works really in two ways. first of all, frito-lay making the shells and most importantly partnering with the doritos brand with doritos on the outside and taco bell on the inside. so that's sort of magnitude of the partnership. >> you launched this at midnight last night across your 5,600 stores here. reaction, what was the reaction like? >> i was out at restaurants until about 2:00 in the mornin

. >> their newest creation is the doritos loco taco. a taco shell made from nacho cheese dorito. morning. how are you? >> greg, i'm really good. listen, if i wasn't on jenny craig, i would try it, but i intend to the minute i get the opportunity. i'm curious about where the idea came from. >> well, the idea came from the -- as you know, we turn 50 today, so -- >> happy birthday. happy birthday. >> thank you very much. thank you. so, glenn introduced the crunchy taco to america 50 years ago. we thought, what better way to celebrate our 50th anniversary than to reinvent the taco. we went to our friends at frito lay and dorito and we've been working with them. >> i'm thinking, are you handing out breath mints with the taco? as you may know, doritos are really tough. >> no. people love doer retos and people love taco bell. our customers have said, these two coming together is an amazing combination. >> how do you go about creating this? >> well, you sit down with a great partner, frito lay, who makes doritos. we said, help us reinvent the taco. that's really where it came from. we di

. >>> taco bell on thursday began selling its new doritos loco tacos, a taco with a shell made out of the new slogan, we hate you. >>> it is being called the most troubled base in the military. we'll look at the recent problems at lewis-mcchord in washington state, home base for the suspect in the shooting rampage in afghanistan. >> lara logan who knows the area well will give insight. >>> its time for this morning's "healthwatch" first. here's dr. holly phillips. >> good morning. today in "healthwatch," the hygiene hypothesis and asthma. it may be surprising, more and more we're learning that being too clean can make us sick. it's the hygiene hypothesis. it may be to blame for the rising rates of asthma and allergies. a large study looked at 29,000 swiss and amish children growing up in farming communities surrounded by air bon allergens such as pollen and cow dander. they had much lower rates of asthma and allergies than children in surrounding communities who did not grow up on farm. while nearly 50% of nonfarm population has some allergic sensitivities, the amish children had only