US mezzo-soprano Joyce Didonato (L) performs on stage during a rehearsal of "Innocence", the final opera by the late Finnish composer Kaija Saariaho, at the Metropolitan Opera in New York on April 1, 2026. School shootings are a tragically common occurrence in the United States, but rarely do they grace the stage of one of the world's premier opera houses. But on Monday, Kaija Saariaho's "Innocence" -- which explores how a devastating attack at an international school in Finland reverberates through the lives of its survivors -- will debut at the Metropolitan Opera in New York. (Photo by ANGELA WEISS / AFP via Getty Images)