Russia's use of a nuclear weapon in Ukraine would be catastrophic, but not solely because of the physical damage the it would cause, Paul Poast writes.
"Even when 'people power' succeeds in ousting oppressive leaders, there is no guarantee that what comes next is peace or democracy," Elizabeth Shackelford writes.
"I think this is part of a process that North Korea is carrying out, to try to normalize their weapons programs over all," Karl Friedhoff tells BBC World News.
"Britain's leadership change offers an opportunity to take stock of the US and UK's 'special relationship,' which now looks pretty normal," Paul Poast argues.