“Russia does not have in its possession any trustworthy data that supports the existence of nuclear weapons or any weapons of mass destruction in Iraq and we have not received any such information from our partners as yet.”

Quoted in https://www.bbc.com/news/av/world-europe-50265870/mikhail-gorbachev-tells-the-bbc-world-in-colossal-danger Mikhail Gorbachev tells the BBC: World in ‘colossal danger’, BBC World News,(4 November 2019)
2000s

Press remarks http://web.archive.org/web/20020217230935/http://www.state.gov/secretary/rm/2001/933.htm with Foreign Minister of Egypt Amre Moussa, in Ittihadiya Palace, Cairo (24 February 2001).
2000s

Source: On Iraq's other political parties, as quoted in "Sunni Militants Advance Toward Large Iraqi Dam" http://www.nytimes.com/2014/06/26/world/middleeast/isis-iraq.html (June 2014), The New York Times.

Interview (18 December 1997) http://www2.gwu.edu/~nsarchiv/coldwar/interviews/episode-21/turner1.html for CNN : Cold War. Episode 21 : Spies (14 March 1999)
1990s
Context: America and Russia have excessive numbers of nuclear weapons today because we treated nuclear weapons, at the end of World War II, like they were just bigger conventional weapons. If you have tanks, and the other side has more than you, you may be in trouble — or airplanes or ships or whatever. With nuclear weapons, it's not the same: they're too powerful, and at some point you just can't use any more, it's just not meaningful. But what happened was, we had the lead of course, because we invented them. The Russians tried to catch up with us; we tried to stay ahead of the Russians; they tried to catch up with us, and we just had a never-ending race upward. By the mid-Sixties, we realized this, but because of the Cold War mentality, politicians couldn't stand up and say, "I'm willing to have less than the Soviet Union," and so the race continued, but we tried to mitigate it by instituting an arms control process, which at first tried to cap and then later to reduce these numbers. … there's just no way you can actually use them; they become so destructive. I estimate that a couple of hundred nuclear weapons, not just on the center of cities, but on economic positions in the country, will drive a country to the point it will never recover, it will never be the same again. It will survive, but it'll be a totally different country. You don't need thousands to do that. There are only a few hundred cities of any size in even Russia or the United States, like 200, and you just don't need thousands of weapons to demobilize a country.

"Peace as a Civil Right" from A Prayer for America (2003) [Nation Books, ISBN 1-56025-510-2], p. 76

Calgary Herald, March 7, 2003

Nobel lecture (2005)
Context: As long as some of us choose to rely on nuclear weapons, we continue to risk that these same weapons will become increasingly attractive to others.
I have no doubt that, if we hope to escape self-destruction, then nuclear weapons should have no place in our collective conscience, and no role in our security.
To that end, we must ensure — absolutely — that no more countries acquire these deadly weapons.
We must see to it that nuclear-weapon states take concrete steps towards nuclear disarmament.
And we must put in place a security system that does not rely on nuclear deterrence.

2nd Presidential Debate, October 8, 2004
2000s, 2004

Time (8 June 1981) " An Interview with Gaddafi http://www.time.com/time/magazine/article/0,9171,922551-2,00.html"
Interviews