With no end in sight to invasion of Ukraine, effect of sanctions ripples through world of Jewish philanthropy

Former jailed dissident calls on his peers, Russian billionaires Mikhail Fridman and Petr Aven, to 'step up to the microphone and say that Putin is a war criminal'

Mikhail Fridman and Petr Aven, who co-founded investment firm, insist they have 'no financial or political relationship' to Putin or the Kremlin