Operation Entebbe (also known as the Yonatan Operation (Hebrew: מבצע יונתן), the Entebbe Raid or Operation Thunderbolt) was a counter-terrorism hostage-rescue mission carried out by the Israel Defense Forces (IDF) at Entebbe Airport in Uganda on the night of 3 July and early morning of 4 July 1976. IDF acted on intelligence provided by Israeli secret agency Mossad. In the wake of the hijacking of Air France Flight 139 by members of the militant organizations Revolutionary Cells and the Popular Front for the Liberation of Palestine - External Operations and the hijackers' threats to kill the hostages if their prisoner release demands were not met, a plan was drawn up to airlift the hostages to safety. These plans took into account the likelihood of armed resistance from Ugandan military troops. Originally codenamed Operation Thunderball by the IDF, the operation was retroactively renamed Operation Yonatan in memory of the Sayeret Matkal commander Lieutenant Colonel Yonatan "Yoni" Netanyahu, the older brother of Benjamin Netanyahu, who was the only commando killed in the fighting. All the hijackers, three hostages and 45 Ugandan soldiers were killed, and five Israeli commandos were wounded. A fourth hostage was murdered by Ugandan army officers at a nearby hospital. Idi Amin, the leader of Uganda at the time, was humiliated by the surprise raid. He believed Kenya had colluded with Israel in planning the raid and hundreds of Kenyans living in Uganda were massacred soon afterwards. The building in which the hostages were being held was built by an Israeli construction firm, which still had the blueprints. While planning the military operation, the Israeli army built a partial replica of the airport terminal with the help of the construction firm.