WASHINGTON -- On Sept. 6, something important happened in northern Syria. Problem is, no one knows exactly what. Except for those few who were involved, and they're not saying.

We do know that Israel carried out an airstrike. How then do we know it was important? Because in Israel, where leaking is an art form, even the best informed don't have a clue. They tell me they have never seen a better-kept secret.

Which suggests that whatever happened near Dayr az Zawr was no accidental intrusion into Syrian airspace, no dry run for an attack on Iran, no strike on some conventional target such as an Iranian Revolutionary Guard base or a weapons shipment on its way to Hezbollah in Lebanon.

Circumstantial evidence points to this being an attack on some nuclear facility provided by North Korea.

Three days earlier, a freighter flying the North Korean flag docked in the Syrian port city of Tartus with a shipment of "cement." Long way to go for cement. Within days, a top State Department official warned that "there may have been contact between Syria and some secret suppliers for nuclear equipment." Three days later, the Sept. 19 six-party meeting on dismantling North Korea's nuclear facilities was suddenly postponed, officially by China, almost certainly at the behest of North Korea.

Apart from the usual suspects -- Syria, Iran, Libya and Russia -- only two countries registered strong protests to the Israeli strike: Turkey and North Korea. Turkey we can understand. Its military may have permitted Israel an overflight corridor without ever having told the Islamist civilian government. But North Korea? What business is this of North Korea's? Unless it was a North Korean facility being hit.

Which raises alarms for many reasons. First, it would undermine the whole North Korean disarmament process. Pyongyang might be selling its stuff to other rogue states, or perhaps just temporarily hiding it abroad while permitting ostentatious inspections back home.

Second, there are ominous implications for the Middle East. Syria has long had chemical weapons -- on Monday, Jane's Defence Weekly reported on an accident that killed dozens of Syrians and Iranians loading a nerve-gas warhead onto a Syrian missile -- but Israel will not tolerate a nuclear Syria.

Tensions are already extremely high because of Iran's headlong rush to go nuclear. In fending off sanctions and possible military action, President Mahmoud Ahmadinejad has chosen a radically aggressive campaign to assemble, deploy, flaunt and partially activate Iran's proxies in the Arab Middle East:

(1) Hamas launching rockets into Israeli towns and villages across the border from the Gaza Strip. Its intention is to invite an Israeli reaction, preferably a bloody and telegenic ground assault. Continued...