because they don't want to leave anything unturned, but they have so little to go on. he brought up food poisoning today. no one is thinking a bad salad caused the com system to go down, but they have just ex-ploerd everything and looking at all possibilities. dead end, you can't say that. an investigation can always takeny twists and turns. but i think they're stymied. >> david, mary, always great to have you. obviously continue this conversation throughout the morning as this investigation continued. but we have no hard leads right now. let's take a look at more of your headlines. the white house is claiming victory after 7.1 million americans signed up for health care coverage under obamacare surpassing the original target of 7 million. president obama says the affordable care act is here to