Despite the prevalence of opinions that Vladimir Putin has lost his mind, nuclear weapons experts continue to see the Russian president as a rational man who isn’t willing yet to risk the severe consequences of using a nuclear weapon on Ukraine. Putin is growing increasingly isolated as the assault on Ukraine nears its third week, and the Russian leader’s decision to put his nuclear forces on high alert has raised fears about how far he might go. But 10 nuclear weapons experts… – Newsweek Photo: C-Span Screengrab