. >> 28-year-old facebook ceo mark zuckerbrg says that his company's stock performance has been disappointing. these are his first public remarks since facebook went public in may. these remarks are about 35 men against. -- about 35 minutes. >> please join me in welcoming to the stage facebook founder mark zuckerberg and techcrunch founder michael arrington. [applause] they are already yelling. >> what is that? did i mess up already? there are a few more people in here. i think they want to hear what you have to say. welcome to techcrunch. >> thank you for having me. >> this venue probably looks familiar. you probably feel fairly comfortable. >> you get more people in here than we do. >> are you ready? a few questions to start. you went public on may 18th and the stock has lost half its value roughly. >> just get right into it. [laughter] >> if you could have done anything differently with hindsight, would you have? >> the performance of the stock has been disappointing. we are going to do the things that we think are going to build value over the long term. over the next 3-5 years, the bigge