Outside Jalalabad, Afghanistan, 25 years ago this week, an angry young man named Abdul Wahab Quanat recited his prayers, walked onto a farm field near a Soviet airfield, raised a Stinger missile launcher to his shoulder and shot his way into history.

It was the first time since the Soviet invasion seven years earlier that a mujahedeen fighter had destroyed the most feared weapon in the Soviet arsenal, a Hind attack helicopter. The event panicked the Soviet ranks, changed the course of the war and helped to break up the USSR...