Derek Grossman is a senior defense analyst at the think tank RAND Corp. in Santa Monica, California, and an adjunct professor in the practice of political science and international relations at the University of Southern California. He formerly served as an intelligence adviser at the Pentagon.
Opinion
Putin's embrace of Kim Jong Un has its limits
Upcoming trip will underscore deepening ties, but Russia remains cautious
North Korean leader Kim Jong Un, right, with Russian President Vladimir Putin in September at the Vostochny Cosmodrome. (KCNA via Reuters)
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