A KGB agent shipped a Sidewinder missile by mail to Moscow (2017)

In the course of related operations, the People’s Liberation Army Air Force received the order to establish air superiority over several islands close to mainland China still held by Taiwan’s Nationalists, specifically Quemoy and Matsu. When the People’s Liberation Army began shelling Quemoy and Matsu, in August 1958, the United States helped re-equip several squadrons of the Republic of China Air Force with North American F-86F Saber fighter jets. Correspondingly, the Pentagon decided to equip some of the ROCAF’s F-86 with its then brand-new and still super-secret weapon, the infrared-homing air to-air missile with the designation AIM-9B Sidewinder.

Source: nationalinterest.org