richard delaureau to come in, he has been briefing reporters and the american public since the two bombings occurred at the end of the boston marathon on monday. three people were killed. nearly 200 people were injured. he was supposed to have this news conference yesterday but it was indefinitely postponed and now finally it will happen and we anticipate getting the very latest from the fbi agent in charge. tom fuentes is here with me as we await the start of the news conference. he is fully prepared, tom, you're a former fbi assistant director, our analyst now. but he is coming in and knows precisely what he wants the american public to know. >> right. that is exactly right and among the considerations that have been going on since yesterday. they have one issue of informing the public and the other of having to be careful about what kind of strategy issues they reveal. >> they don't want to do anything to undermine the investigation. at the same time they believe people might be able to help with some evidence. >> people might be able to help but at the same time they don't want to jepti