Answer the question at the end by quoting:

Jacques-Yves Cousteau  (French: [Zak iv kusto]; commonly known in English as Jacques Cousteau; 11 June 1910 - 25 June 1997) was a French naval officer, explorer, conservationist, filmmaker, innovator, scientist, photographer, author and researcher who studied the sea and all forms of life in water. He co-developed the Aqua-lung, pioneered marine conservation and was a member of the Academie francaise. Cousteau described his underwater world research in a series of books, perhaps the most successful being his first book, The Silent World: A Story of Undersea Discovery and Adventure, published in 1953.
The years of World War II were decisive for the history of diving. After the armistice of 1940, the family of Simone and Jacques-Yves Cousteau took refuge in Megeve, where he became a friend of the Ichac family who also lived there. Jacques-Yves Cousteau and Marcel Ichac shared the same desire to reveal to the general public unknown and inaccessible places -- for Cousteau the underwater world and for Ichac the high mountains. The two neighbors took the first ex-aequo prize of the Congress of Documentary Film in 1943, for the first French underwater film: Par dix-huit metres de fond (18 meters deep), made without breathing apparatus the previous year in the Embiez islands (Var) with Philippe Tailliez and Frederic Dumas, using a depth-pressure-proof camera case developed by mechanical engineer Leon Veche (engineer of Arts and Metiers and the Naval College).  In 1943, they made the film Epaves (Shipwrecks), in which they used two of the very first Aqua-Lung prototypes. These prototypes were made in Boulogne-Billancourt by the Air Liquide company, following instructions from Cousteau and Emile Gagnan. When making Epaves, Cousteau could not find the necessary blank reels of movie film, but had to buy hundreds of small still camera film reels the same width, intended for a make of child's camera, and cemented them together to make long reels.  Having kept bonds with the English speakers (he spent part of his childhood in the United States and usually spoke English) and with French soldiers in North Africa (under Admiral Lemonnier), Jacques-Yves Cousteau (whose villa "Baobab" at Sanary (Var) was opposite Admiral Darlan's villa "Reine"), helped the French Navy to join again with the Allies; he assembled a commando operation against the Italian espionage services in France, and received several military decorations for his deeds. At that time, he kept his distance from his brother Pierre-Antoine Cousteau, a "pen anti-semite" who wrote the collaborationist newspaper Je suis partout (I am everywhere) and who received the death sentence in 1946. However, this was later commuted to a life sentence, and Pierre-Antoine was released in 1954.  During the 1940s, Cousteau is credited with improving the aqua-lung design which gave birth to the open-circuit scuba technology used today. According to his first book, The Silent World: A Story of Undersea Discovery and Adventure (1953), Cousteau started diving with Fernez goggles in 1936, and in 1939 used the self-contained underwater breathing apparatus invented in 1926 by Commander Yves le Prieur. Cousteau was not satisfied with the length of time he could spend underwater with the Le Prieur apparatus so he improved it to extend underwater duration by adding a demand regulator, invented in 1942 by Emile Gagnan. In 1943 Cousteau tried out the first prototype aqua-lung which finally made extended underwater exploration possible.

What made this film special?

they used two of the very first Aqua-Lung prototypes.



Answer the question at the end by quoting:

Francis Piol Bol Bok (born February 1979), a Dinka tribesman and native of South Sudan, was a slave for ten years but is now an abolitionist and author living in the United States. On May 15, 1986, he was captured and enslaved at the age of seven during an Arab militia raid on the village of Nyamlel in South Sudan during the Second Sudanese Civil War. Bok lived in bondage for ten years before escaping imprisonment in Kurdufan, Sudan, followed by a journey to the United States by way of Cairo, Egypt. Bok was aided by people of diverse cultures and faiths in his journey to freedom.
Seven-year-old Bok was captured by Giemma, a member of the slave hunting militia, who forced him to join a caravan of slaves, stolen produce, livestock and wares that the militia had captured in their raid of the Dinka settlement. When the members of the militia split up to return to their homes, Bok was taken by Giemma. Upon arriving at Giemma's residence, Francis was beaten by his captor's children with sticks and was called abeed. The word literally means "slave" and the stereotype is that of an inferior, demeaned, Negroid race. Francis was given quarters in a hovel near the pens of Giemma's livestock.  Bok began a ten-year period of slavery at the hands of Giemma and his son Hamid. He was forced to tend the family's herds of livestock. He had to take them to pastures in the area and to local watering holes, where he saw other Dinka boys who were also forced to tend herds of livestock. He began to suspect that his life was going to change forever and that his father was not going to be able to save him. His attempts to speak to the other Dinka boys were futile, as they were speaking Arabic, which he could not understand; they also seemed afraid to speak to him.  According to Bok, as he grew older, Giemma and Hamid began to place more trust in his abilities as a herdsman. Care of the cattle, horses and camels was passed to Bok and he was able to spend more time alone with the animals. Previously he had been under the careful supervision of Hamid and sometimes Giemma. In addition to having him serve as his slave, Giemma forced Francis to convert to Islam and to take the Arabic name of Abdul Rahman, meaning "servant of the compassionate one." In his autobiography, Francis states that although he was forced to convert to Islam, that he never stopped praying to God for strength to get him through his ordeal.  Bok tried twice to flee from slavery at the age of 14. The first instance happened early one morning after he had been sent out with the cattle. Bok blindly ran down a road for several miles before he was captured by one of Giemma's fellow militia members. Giemma's peer returned Francis to the Giemma's compound, where he was beaten with a bullwhip. Bok attempted to escape once again just two days later, when he fled in the opposite direction of his previous escape. He once again fled for several miles, this time keeping to the forest. He stopped for water at a local stream crossing, where he was spotted by Giemma who happened to be there as well. Giemma forced Francis back to his home, this time promising to kill him. Francis was beaten again, but Giemma chose not to kill him, as Francis had become too valuable to the family as a slave.

How long was he forced to do this?
ten-year period of slavery