On 10 September 1976 , Zvonko and his wife , Julienne , along with Petar Matanić and Frane Pešut , hijacked a commercial Trans World Airlines plane , Boeing 727 , Flight 355 , heading from New York to Chicago .
A group of Croatian terrorists made up of Zvonko and his wife , Julienne Bušić , Petar Matanić , Frane Pešut and Slobodan Vlašić hijacked a commercial Trans World Airlines plane on September 10 , 1976 . It was Boeing 727 Flight 355 , heading from New York City to Chicago .