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 Putin says Ukraine is developing nuclear weapons, is that real?
What are the real reasons Putin invaded Ukraine? 

What are hypersonic weapons?

Experts’ Answers

Matt Korda

Senior Research Fellow, Nuclear Information Project | Federation of American Scientists

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Mariana Budjeryn
Mariana Budjeryn
Matt Korda
Matt Korda
Olga Oliker
Olga Oliker
Carol Saivetz
Carol Saivetz
Brian Taylor
Brian Taylor
Elizabeth Wood
Elizabeth Wood