Smoke fills the sky during an eruption of Mt. Etna volcano, near Catania in Sicily, southern Italy, early Tuesday, Feb. 23, 2021. The explosion started before midnight on Monday night, provoking a huge eruption plume that rose for several kilometers from the top of Etna, as reported by The National Institute of Geophysics and Volcanology, Etneo Observatory. (AP Photo/Salvatore Allegra)