After he retired Sada was living a quiet life in Iraq, but when after 2003 Invasion of Iraq by the United States armed forces, Sada sided with the US government in their invasion of Iraq and aided in the fight against Saddam Hussein. During the invasion of Iraq, Sada served as spokesman for the interim leader Iyad Allawi, and he was appointed as National Security Advisor.
In August 2004 Sada announced that he would be signing a bill to introduce the death penalty in Iraq. The bill introduces the death penalty for anyone who is "threatening national security". (on al-Jazeera)
On January 24, 2006, he announced the publication of a book he had written entitled Saddam's Secrets: How an Iraqi General Defied And Survived Saddam Hussein, with the tagline "An insider exposes plans to destroy Israel, hide WMD's and control the Arab world."[1] Sada, the former Air Vice-Marshal under Hussein, appeared the following day on Fox News' Hannity & Colmes, where he discussed his book and reported that other pilots told him that Hussein had ordered them to fly portions of the WMD stockpiles to Damascus in Syria just prior to the 2003 Invasion of Iraq. After the release of his book, Sada was interviewed by Fox News, and he stated:
"Well, I want to make it clear, very clear to everybody in the world that we had the weapon of mass destruction in Iraq, and the regime used them against our Iraqi people...I know it because I have got the captains of the Iraqi airway that were my friends, and they told me these weapons of mass destruction had been moved to Syria. Iraq had some projects for nuclear weapons but it was destroyed in 1981".
When asked during his interview with Fox News if there was any chance that there were nuclear weapons or on their way to nuclear weapons when USA invaded, he said "Not in Iraq". Sada made a guest appearance on The Daily Show on March 21, 2006 to promote Saddam's Secrets. His (Sada's) claims, though, tend to contradict the findings of the Duelfer Report, which "judged that it was unlikely that an official transfer of WMD material from Iraq to Syria took place," though analysts were unable to rule out the possibility.