One crew member from US fighter jet downed in Iran has been rescued, US media report
BBC →All six crew members of a US military refuelling aircraft were killed in an incident involving a second aircraft on March 12 in western Iraq, CentCom also said.
Three U.S. Officers Missing in Iran
TEHERAN, Iran. April 22—An Iranian Air Force plane carrying three American officers and one Iranian was reported missing today on a mapping mission. Twenty planes began a widespread search of a vast desert area. Authorities said bad weather may have forced the single-engine plane to land somewhere between Kerman, the origin of the flight, and Teheran, the destination. The United States Embassy declined to release the names of the Americans.
Original Newspaper Page
Enlarge → What Happened Next
Incident – 1958 C-130 shootdown incident
On September 2, 1958, a Lockheed C-130A-II-LM, from the 7406th Support Squadron, departed Incirlik Airbase in Turkey on a reconnaissance mission along the Turkish-Soviet border. It was later intercepted and shot down by four Soviet MiG-17s 34 miles north-west of Yerevan. The six flight crew were confirmed dead when their remains were repatriated to the United States, but the 11 intelligence-gathering personnel on board have never been acknowledged by Soviet/Russian authorities.
Wikipedia →Central Treaty Organization
Timeline
I cannot select sentences from the provided Wikipedia excerpt because it does not contain information about the 1958 incident involving three U.S. officers missing in Iran. The excerpt only provides a timeline of the Baghdad Pact/CENTO alliance formations and membership changes, with no content related to the missing aircraft event described in your context.
Wikipedia →1960 U-2 incident
On 1 May 1960, a United States U-2 spy plane, having taken off from Peshawar in Pakistan, was shot down by the Soviet Air Defence Forces in Sverdlovsk, Russia. As a result of the spy plane incident and the attempted cover-up, the Four Power Paris Summit was not completed — Khrushchev left the summit one day after it had begun, and prospects for an easing of Cold War tensions were dashed.
Wikipedia →