“unauthorized enrichment facilities” as IO targets in a May 2010 article ★ 24.10.11

History, but anyhow. Jon Baumgartner, “Computers as Weapons of War”, IO Journal, May 2010, pp. 5-8:

Similar IO attacks could be conducted against nation states that have violated international treaties in order to carry out as uranium enrichment for nuclear weapons. Most of the unauthorized enrichment facilities in these cases are constructed deep underground. Conventional munitions, including bunker busters, could have difficulty penetrating and damaging these hardened structures. Cyber munitions, however, could be used to destroy key equipment used in the enrichment process. One of the primary IO targets would be the gas centrifuges used to create weapons grade uranium. The rotors within these centrifuges operate at extremely high speeds (e.g. 50,000 RPM). A cyber attack that increased the RPMs beyond normal safely levels could result in a catastrophic failure of a single centri- fuge. Implementing this IO attack across thousands of centri- fuges has the potential to disrupt enrichment operations for considerable periods of time.

A couple of months before Stuxnet broke news.