they created a product which is identical to their own method of comedic asian, which is in direct. -eir own method of communication, which is in direct. emily: how difficult will it be to change the culture from the inside out? tim: it is intimately difficult whether you choose an internal or external candidate. you just need to keep at it. but you need to have something to say as well. they need to first decide what they are doing and what they want to be, and then the messaging can glflow. changing any culture is tough in such a high profile fishbowl as twitter is. multiply it times 100 or 1000. emily: tim morse, a guy who is been in jack's position. we will continue this conversation after a quick break. we are talking about a dramatic shakeup at twitter. dick costolo, the ceo, is out. ♪ emily: we're back to our breaking news. dick costolo stepping down as ceo twitter. jack dorsey stepping in as interim ceo. we have an early investor twitter, and also a former yahoo! cfo, and adjoining lascivious type -- and when this kjjoining us via skype. who can be the new ceo of twitter? who