In a moving moment of solidarity, “Saturday Night Live” opened its show not with jokes but with a powerful tribute to Ukraine.The Ukrainian Chorus Dumka of New York took the famous Rockefeller Center stage to perform “Prayer for Ukraine,” a patriotic Ukrainian hymn and anthem, during the show’s cold open. The sobering performance followed Russian President Vladimir Putin’s military invasion into the country earlier in the week.“SNL” cast members Kate McKinnon and Cecily Strong introduced viewers to the choir. Following the performance, the camera panned to white candles on a table that spelled out “Kyiv,” the Ukrainian capital, as the audience sat in silence.It’s a rare event for the decadeslong comedy show to open with such a solemn act.