good jack dorsey, the founder of twitter was solving a problem that was an urban problem that has spread to the world. >> they attract the risk seekers and creative entrepreneurs, so it is a magical combustion of ideas, and i would ask the ability to get these done. >> every generation has its major technology, so right now we are seeing three major trends. we were a startup 12 years ago, so we have made 21 acquisitions. 17 have had some major presence in san francisco, and they have all been about cloud computing and even the client. -- cloud. >> another factor worth noting i see them taking engineers from san francisco to the valley. that is an issue we cannot ignore. the data we are getting is staggering. some of those start-ups are the star companies. over 80% of their employees work and live in san francisco. that is not the case for a lot of other companies we know the names of, and we need to address those issues. we are working to adjust this. if you could sum up the goal, what affect you? in a couple of years, is there a way we track whether this has been successful or not in re

. >> if jack dorsey approaches you for an investment, take it.founder of twitter. >> i love rebecca. ,,,,,,,, >>> nashville, tennessee. hope you're feeling good this morning. hope the rest of you are feeling good. welcome to "cbs this morning saturday." i'm rebecca jarvis. >> and i'm jeff glor. coming up, a group of wounded war heroes about to embark on a seeming impossible task here. we'll talk to them about why they're climbing america's highest peak together. >> incredible men, incredible story. you don't want to miss it. >>> also a young girl from north carolina, she knows about overcoming hardships. she was abandoned by her parents, but she never gave up and she's going to tell us how studying by candlelight helped pave her path to the ivy league. >>> another guy who's inspired a city, nba rookie sensation cakye irving will be here talking nba finals and tonight's huge game seven between the celtics and heat. what's going to happen tonight. what's lebron james going to do today? we look forward to chatting with kyree very soon. >>> first our

we're very fortunate to be able to work with people who have those qualities at benchmark like jack dorsey with mark at facebook and reed hoffman at linked in before facebook. whether it's jack, true drop box, dustin at ensanaa, it's a quality that we look for in every entrepreneur we back. >> matt, i want to ask you about one of the biggest issues one of the analysts today have flags as they come out issuing coverage, monetization of mobile. having been there at the founding of linked in and been there at facebook, also the founding of that company, i'm wondering if monetization is inevitable, just a matter of how long, linked in seems to be on the more successful side of making mobile work, having users use mobile and having that make money for them as opposed to a facebook. i don't want to knock facebook. a lot of companies having problems shifting those users to mobile and making the same amount of money off of them versus pc user. >> the emergence of mobile is very, very exciting trend. it's very real at this point. there are hundreds of millions of iphones and ipads shipping in the m