Dr. Hamza's credentials and testimony have been challenged by others who dispute his knowledge of Iraq's nuclear programme. Imad Khadduri, a former scientist with the Iraqi Atomic Energy Commission, accused Hamza of exaggerating "to a great extent his own role in the nuclear weapon program." Hussein Kamel al-Majid, son-in-law of Saddam Hussein, who defected to Jordan in 1995, described Hamza as "a professional liar." David Albright, a former nuclear weapons inspector in Iraq, stated "Hamza had some good information about Iraqi nuclear programs until his departure from Iraq, but that's it."