Zvonko Bušić (23 January 1946 – 1 September 2013) was a Croatian emigrant, responsible for hijacking TWA Flight 355 in September 1976. He was subsequently convicted of air piracy and spent 32 years in prison in the United States before being released on parole and deported in July 2008.
Zvonko Bušić was born in 1946 in Gorica, FS Bosnia and Herzegovina, DF Yugoslavia. He finished gymnasium in Imotski, graduating in Zagreb, and emigrated to Vienna in 1966 to pursue history and Slavic studies at university. There, in 1969, he met an American student, Julienne Eden Schultz, who was studying German and thereafter became involved in Bušić's political activities. The couple and a friend traveled to Zagreb and threw anti-Yugoslav leaflets from the Ilica skyscraper on Republic Square (now Ban Jelačić Square), after which they were arrested and imprisoned. After her release, Julienne returned to Vienna and in 1972, Julienne and Zvonko married in Frankfurt, and later relocated to the United States.
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. The mastermind of the hijacking, Zvonko Bušić, delivered a note to the captain in which he informed him that the airplane was hijacked, that the group had five gelignite bombs on board, and that another bomb was planted in a locker across from The Commodore Hotel in New York with further instructions.