for more, i'm joined by our tech editor, ari leavy. who might twitter be targeting?y going after snap chat? >> think about it as any service trying to get people to communicate by a message or photos. snap chat is obvious, but also facebook, instagram, and we have been saying all along, for twitter to work as a big business, it has to increase engagement and key people in service for longer and coming back more frequently. this is basically a way of saying if you are using another service to snap photos and send them to a friend, you don't need >> we have all had direct message fails and they are truly horrible. i'm imagining a fail with a photo. that's something you would not want. this is why snap chat is appealing to a lot of people because the photos disappear. how does this compare to what snap chat and facebook already offer? >> the big thing for snap chat, the novel technology behind it is the disappearing message. what sort of i.t. they have behind it, i don't know. it's a small company, only 30 people. it does not appear twitter is going after that user. wha