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El Al Flight 402 is shot down by two fighter jets after straying into Bulgarian air space. All 58 people on board are killed.
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El Al Flight 402
1955 airliner shootdown
El Al Flight 402 was an international passenger flight from London to Tel Aviv via Vienna and Istanbul. On 27 July 1955, the flight, operated by a Lockheed Constellation registered as 4X-AKC, strayed into then-Communist Bulgarian airspace and was attacked by two Bulgarian MiG-15…Source: Wikipedia (CC BY-SA)