DAMASCUS, Syria — Morning light poured through the stained glass windows, casting amber and crimson pools on the marble floor where Fadi Ghatas knelt. The air inside St. Elias Greek Orthodox Church was heavy with incense, and 350 voices rose together in song. That was until the bomber struck. There was a sudden commotion at the church doors, then the sharp crack of gunfire ripping through glass and stone. Screams rose before a final, deafening blast silenced everything.