How Likely is a Nuclear Exchange Between the US and Russia?

2019 https://www.google.com/url?q=https://www.rethinkpriorities.org/blog/2020/6/19/how-likely-is-us-russia-nuclear-war&sa=D&source=docs&ust=1659185019517102&usg=AOvVaw1HQo61eTul_VrHeIMgkBZq Online post Medium