In a move reminiscent of Israel when It had a real prime minister, before Israel bombed the Syrian nuke plant…they sent in commandos to get proof that the nuke plant existed. Israel had been spying the site for months and President Bush was told during the summer that Israeli intelligence suggested North Korean personnel and nuclear-related material were at the Syrian site. they drew plans to blow up the Syrian compound but held back because the folks in Washington were not satisfied it was a nuclear compound.
To get the evidence they sent in commandos from the elite Sayeret Matkal unit who brought back nuclear materials which were proved to be North Korean…thats when Washington gave the operation its “hecksher”

Israeli commandos seized nuclear material of North Korean origin during a daring raid on a secret military site in Syria before Israel bombed it this month, according to informed sources in Washington and Jerusalem. The attack was launched with American approval on September 6 after Washington was shown evidence the material was nuclear related, the well-placed sources say. They confirmed that samples taken from Syria for testing had been identified as North Korean. This raised fears that Syria might have joined North Korea and Iran in seeking to acquire nuclear weapons. Israeli special forces had been gathering intelligence for several months in Syria, according to Israeli sources. They located the nuclear material at a compound near Dayr az-Zwar in the north. Evidence that North Korean personnel were at the site is said to have been shared with President George W Bush over the summer. A senior American source said the administration sought proof of nuclear-related activities before giving the attack its blessing. Diplomats in North Korea and China believe a number of North Koreans were killed in the strike, based on reports reaching Asian governments about conversations between Chinese and North Korean officials. Syrian officials flew to Pyongyang, the North Korean capital, last week, reinforcing the view that the two nations were coordinating their response.