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Russia merited just one mention in President Barack Obama's State of the Union address on Tuesday night, an offhand remark that his administration will continue to "engage Russia to seek further reductions in our nuclear arsenals." Obama's first term did see some thaw with Moscow -- the "reset," a modest relationship with then President Dmitry Medvedev, and the passage of the New START agreement -- but it's clear that things have become frostier since Vladimir Putin returned to power.