sentences:  Among the first aircraft acquired by the Israeli Air Force were three surplus American B-17s, smuggled via South America and Czechoslovakia to avoid an arms trading ban imposed by the United States.A fourth plane was abandoned due to malfunctions and confiscated by American officials.On their delivery flight from Europe, in retaliation for Egyptian bombing raids on Tel Aviv, the aircraft were ordered to bomb King Farouk's Royal Palace in Cairo before continuing to Israel.