The following year, the group unsuccessfully attempted to bomb a Pan Am flight in Rio de Janeiro, and then successfully detonated a bomb, killing only one passenger, aboard Pan Am Flight 830 on 11 August.
Abu Ibrahim Faction, or 15 May Organization, a minor breakout faction from Wadie Haddad's Popular Front for the Liberation of Palestine - External Operations
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Muhammad al-Umari, aka Abu Ibrahim, leader of the 15 May Organization accused of involvement in the August 11, 1982 bombing of Pan Am Flight 830
With his aid, American intelligence agencies determined that it was the 15 May Organization that had constructed the bomb aboard Pan Am Flight 830.