Here is the relevant part of the exchange:
QUESTION: What kind of probability do you think exists that they currently have a nuclear device?
GEORGE TENET: I think we've unclassified the fact that they probably have one or two plutonium-based devices today.
QUESTION: And how about their, they fired missiles over Japan, what is the likelihood that they currently have a missile capable of hitting the west coast of the United States?
GEORGE TENET: I think the declassified answer is yes, they can do that.
QUESTION: So in all likelihood they have nuclear warheads and an ability to deliver them to the west coast of the United States. Obviously very, very troubling.
LEIGH SALES: Mr Tenet didn’t elaborate further, although US officials admit the ballistic missiles haven't been flight tested, which raises questions about how effective they would be.
Tenet confirmed that North Korean has a missile that could hit the West Coast. He did not confirm that it had a missile that could carry a nuclear warhead. The fact that North Korea has placed a payload in orbit indisputably shows that they have a launching system with intercontinental range that can deliver some sort of payload, so Tenet's comment is hardly surprising. But a limited technical capability does not an effective weapon systems make.