FIM-92 Stinger
A shoulder-fired heat-seeking missile that lets one soldier down a helicopter or jet, from the Afghan mujahideen in 1986 to Ukraine today.

The FIM-92 Stinger is a shoulder-fired anti-aircraft missile, a man-portable air-defense system, or MANPADS, that lets a single soldier destroy a helicopter or low-flying jet worth thousands of times more than the missile itself. In US service since 1981, it homes on the heat of an aircraft's engine exhaust and is 'fire and forget': once the seeker locks on and the missile leaves the tube, the operator can drop the launcher and run while the missile tracks the target on its own. Its effective reach is a few miles.
Afghanistan
The Stinger's reputation was made in Afghanistan. By the mid-1980s Soviet Mi-24 Hind gunships, heavily armored and bristling with rockets, dominated the battlefield and could hunt Afghan guerrillas almost at will. In 1986, after a long internal debate about escalating a covert war, the CIA began funneling Stingers to the mujahideen through Pakistan's ISI intelligence service, as part of the program known as Operation Cyclone. The first confirmed kill came on September 25, 1986, near Jalalabad, when a mujahideen fighter downed a Hind. The effect was immediate. Soviet aircraft were forced to fly higher and more cautiously, losing much of their killing power, and the sense that the war had turned against Moscow deepened. The Stinger did not by itself defeat the Soviet Union in Afghanistan, but it changed the character of the fighting within a year.
Blowback
Success created a new problem. When the war wound down, hundreds of Stingers were unaccounted for, scattered among warlords and smugglers, and Washington feared they would end up shooting down civilian airliners. In 1990 the CIA launched a buy-back program, offering bounties reported at up to six figures for each returned missile. It was a costly and largely failed effort to recover weapons the United States had itself handed out, a textbook case of what intelligence officers call blowback.
Return
The Stinger came back into the headlines in 2022, when the United States and its allies rushed thousands of them to Ukraine to blunt Russian air attacks. The old logic held: a portable missile costing a few hundred thousand dollars can bring down an aircraft worth tens of millions, forcing a far richer air force to fly low, fast, and afraid. That lopsided arithmetic, cheap defense against expensive offense, is exactly why the shoulder-fired missile remains one of the most consequential weapons of the past half-century.