Putin crackdown widens, Russian-American arrested and charged with treason

Ksenia Karelina, an American with dual Russian citizenship has been arrested in Russia and charged with espionage and treason. Karelina's detainment comes as Russian President Vladimir Putin cracks down on dissent in the wake of opposition leader Alexey Navalny's death. CBS News foreign correspondent Imtiaz Tyab has more.

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