Videos circulating online show a low-flying biplane passing over an oil refinery in Salavat, Russia. At first, people thought it was a Ukrainian drone attack. But the plane in the footage doesn’t look like a modern drone—it resembles the vintage An-2 biplane, a design that dates back to 1947. While the exact purpose of the plane’s flight remains a mystery, the incident highlights how this old-fashioned aircraft is still relevant, even in modern warfare.

What Happened in Salavat?

The v...