In July 1968, Popular Front for the Liberation of Palestine (PFLP) hijacked Israeli El Al Airplanes. In 1970, Palestinian Liberation Organization (PLO) killers attacked bus in West Bank, killing Barbara Ertle of Michigan and wounding two others from the US. In March 1970, PFLP lodged rockets at US Embassy, Beirut, as well as the American Insurance Company, Bank of America and John F. Kennedy library. In September 1970, PFLP murderers took hold of four airliners, three of which were blown up.