Saddam could have had nuclear weapons by mid-1990s

if he had not invaded Kuwait, the author of this article argues:

'By demonstrating Iraq’s vulnerability, the attack on Osirak actually increased Hussein’s determination to develop a nuclear deterrent and provided Iraq’s scientists an opportunity to better organize the program. The Iraqi leader devoted significantly more resources toward pursuing nuclear weapons after the Israeli assault. As Reiter notes, “the Iraqi nuclear program increased from a program of 400 scientists and $400 million to one of 7,000 scientists and $10 billion.”

Iraq’s nuclear efforts also went underground. Hussein allowed the IAEA to verify Osirak’s destruction, but then he shifted from a plutonium strategy to a more dispersed and ambitious uranium-enrichment strategy. This approach relied on undeclared sites, away from the prying eyes of inspectors, and aimed to develop local technology and expertise to reduce the reliance on foreign suppliers of sensitive technologies. When inspectors finally gained access after the 1991 Persian Gulf War, they were shocked by the extent of Iraq’s nuclear infrastructure and how close Hussein had gotten to a bomb.

Ultimately, Israel’s 1981 raid didn’t end Iraq’s drive to develop nuclear weapons. It took the destruction of the Gulf War, followed by more than a decade of sanctions, containment, inspections, no-fly zones and periodic bombing — not to mention the 2003 U.S. invasion — to eliminate the program. The international community got lucky: Had Hussein not been dumb enough to invade Kuwait in 1990, he probably would have gotten the bomb sometime by the mid-1990s.'