This four-part series tells the shocking true stories of some of the most infamous hijackings, sieges and hostage stand-offs that have gripped the world. This episode, in 1970, the Middle East was in turmoil. Hundreds of thousands of Palestinians were living in refugee camps. They were angry, and many were prepared to do anything to get their land back. One group of Palestinian militants had a shocking plan to make the world aware of their plight - by carrying out the largest string of hijackings the world had ever seen.