BELMONT _  The annual Ecumenical Service of Salutations to the Holy Cross is frequently a joyous coming together of the Greek Orthodox and Roman Catholic communities of the San Francisco Bay Area. This year, however, it was “tinged with a certain somber tone and sense of urgency, as we are following with horror of the war being waged on our brother and sister Christians in Ukraine,” Archbishop Salvatore J. Cordileone said in his homily at the joint service hosted by San Francisco Greek Orthodox Metropolitan Gerasimos on the evening of March 10.