united states now believes malaysia airlines flight 17 was shot down yesterday by a surface-to-air missile launched from ukrainian territory controlled by pro russian separatists. this makes it one of the most deadly civilian plane shoot downs in history but not the first. kate snow has more. >> reporter: it was september 1st, 1983, the height of the cold war. >> the united states today accused the soviet union of shooting down a korean airline jumbo jet. >> reporter: days later, president reagan ai addressed the nation. >> i'm coming to you tonight about the korean massacre, the attack of the soviet union against 269 innocent men, women and children aboard an aun armed korean passenger plane. >> it was supposed to fly from new york city to seoul stopping in anchorage, alaska but it drifted off course to soviet air space. jets intercepted the plane and fired warning shots that were