NATALIE ALLEN, CNN ANCHOR: There's new information today about the laptop computer that disappeared from the State Department in February. CNN national security correspondent David Ensor has learned something about the information which was stored in the laptop and he joins us now from Washington -- David.</s>DAVID ENSOR, CNN NATIONAL SECURITY CORRESPONDENT: Natalie, U.S. officials tell CNN that the stolen laptop had specific information on it about specific incidents of weapons proliferation. And most importantly, it had codeword top secret information about the sources and the methods used to collect the data in the first place. No secrets are more closely held in the intelligence community than sources and methods; the way raw intelligence is gathered. That could include anything, for example, from the identity of an agent working for a foreign power to the technical capabilities of a spy satellite. This particular laptop was used, officials say, to log proliferation incidents. Say, for example the apparent sale of a Chinese or North Korean missile to Iran and the evidence of that transaction. Then officials would screen out the parts of the information that could reveal sources and methods, giving American diplomats a bare bones description that they could use when, for example, protesting to China about such an alleged sale. In short, officials say the information on that laptop was very, very sensitive indeed -- Natalie.</s>ALLEN: Who else might benefit from such information and how is the investigation going to get to the bottom of this?</s>ENSOR: Officials say they frankly still don't have any leads. Who could benefit? Any foreign intelligence service worth its salt would love to get its hands on this information. But particularly, the agencies of foreign powers that are trying to sell weapons of mass destruction or missiles to other countries and trying to get away with it, without the U.S. knowing about it. This would help them know how the U.S. finds out. So it would be very valuable to them in particular -- Natalie.</s>ALLEN: And, as you say, no leads in the investigation. David Ensor, thanks, from Washington.
Laptop Stolen From State Department Contained Top Secret Weapons Proliferation Information