Earlier this week, intelligence officials released new evidence confirming that the "Box on the Euphrates" near al-Kibar in Syria was in fact a nuclear reactor. They also released photographs that they used to argue that North Korea was providing significant levels of assistance to the reactor project in Syria.

The Syrian facility apparently contained a gas-cooled, graphite-moderated reactor (a derivation from the Calder Hall design) extremely similar to the reactor at Yongbyon. It's a relatively simple design, extensively described in the public domain, and one that's capable of producing plutonium useable in nuclear weapons. Despite the surfeit of publicly available information on the reactor, the intelligence community firmly asserts that, in this case, the design information came from North Korea.

Noting that the Syrian reactor seemed ill-suited to electricity production (not least because there were no detectable power lines leading away from the site), intelligence analysts also concluded that it would have few uses other than for producing plutonium for an illicit nuclear weapons program. Israel came to a similar conclusion and, judging this to be a potentially existential threat, bombed the reactor as a result.

These revelations raise more questions than they answer. For instance, why release this evidence now? The analysts said it was hoped that, among other things, releasing this information would prod the North Koreans to be more forthcoming in the six-party talks. It seems just as likely that they may just be infuriated and walk away from negotiations (there is no public sign of such a reaction yet, though).

Perhaps most notable in the briefing on Thursday was how coy the analysts were being about the possibility that Syria has a covert nuclear weapons program. They noted very specifically that "there is no reprocessing facility in the region of al Kibar," but refused to elaborate when asked whether the Syrians might be building such a facility elsewhere. They also refused to comment on how Syria might have been planning to acquire the natural uranium required to fuel the reactor and they dodged a question about how North Korean diplomats have so far reacted to this disclosure.

These omissions could be designed to minimize diplomatic blowback -- perhaps the administration simply hoped to nudge the North Koreans gently, rather than shove them -- or perhaps the spooks simply don’t have much more information. Hopefully the North Korean and Syrian reactions over the next week or so will provide more insight. Watch this space.