and gloria ruben stars on the legal drama "raising the bar." we're glad you joined us, biz stone and actress gloria ruben, coming up right now. tavis: this is the cofounder of twitter which has become a cultural and social phenomena around the world, as if you didn't know. and biz was named to the list of the 100 most flual people in the world. last week when twitter crashed, following a hacker's attack, it became one of the biggest stories on the planet in a matter of hours. biz stone is here. glad to have you here. how you doing? >> excellent. >> you survived the crash. >> we did. >> what have you learned on this side of the crash? >> this is what is called a denial of service attack. it is pretty common on the the internet. it is not going away anytime soon. what we learned, you got to tune your systems to handle this scale of assault. we spent 200 catching up with the popularity of twitter, getting there technically so we're stable and along comes this massive attack -- we learned a lot fromt. we worked behind the scenes from folks from goo