Question:
Edward Rickenbacker was born in Columbus, Ohio, to Swiss German-speaking immigrants. From childhood, he loved machines and experimented with them, encouraged by his father's words: "A machine has to have a purpose". In what was to become one of the defining characteristics of Rickenbacker's life, he nearly died many times in events ranging from an early run-in with a horse-drawn carriage, to a botched tonsillectomy, to airplane crashes. His first life-threatening experience occurred when he was in the "Horsehead Gang".
Rickenbacker's most lasting business endeavor was his longtime leadership of Eastern Air Lines. Through the 1920s, he had worked with and for General Motors (GM): first as the California distributor for its new car, the short-lived Sheridan, then later as a marketer for the LaSalle, and finally as vice president of sales for their affiliate, Fokker Aircraft Company. He persuaded GM to purchase North American Aviation, a conglomerate whose assets included Eastern Air Transport. GM asked him to manage Eastern, beginning in 1935. With the help of some friends, Rickenbacker merged Eastern Air Transport and Florida Airways to form Eastern Air Lines, an airline that eventually grew from a company flying a few thousand miles per week into a major airline. In April 1938, after learning that GM was considering selling Eastern to John D. Hertz, Rickenbacker met with GM's Chairman of the Board, Alfred P. Sloan, and bought the company for $3.5 million.  Rickenbacker oversaw many radical changes in the field of commercial aviation. He negotiated with the U.S. government to acquire air mail routes, a great advantage to companies in need of business. He helped develop and support new aircraft designs. Rickenbacker bought the new, large, faster airliners for Eastern Air Lines, including the four-engined Lockheed Constellation and Douglas DC-4. Rickenbacker personally collaborated with many of the pioneers of aviation, including Donald W. Douglas, the founder of the Douglas Aircraft Company, and the designer and builder of the large, four-engined airliners, the DC-4, DC-6, DC-7, and DC-8 (its first jet airliner).  Rickenbacker promoted flying to the American public, but, always aware of the possibility of accidents, he wrote in his autobiography, "I have never liked to use the word "safe" in connection with either Eastern Air Lines or the entire transportation field; I prefer the word 'reliable'."
Answer this question using a quote from the text above:

What was one of his other businesses.

Answer:
GM

Answer the question at the end by quoting:

Ai Weiwei (Chinese: Ai Wei Wei ; pinyin: Ai Weiwei,  English pronunciation ; born 28 August 1957 in Beijing) is a Chinese contemporary artist and activist. His father's (Ai Qing) original surname was written Jiang (Jiang ). Ai collaborated with Swiss architects Herzog & de Meuron as the artistic consultant on the Beijing National Stadium for the 2008 Olympics.
On 22 June 2011, the Chinese authorities released Ai from jail after almost three months' detention on charges of tax evasion. Beijing Fa Ke Cultural Development Ltd. (Chinese: Bei Jing Fa Ke Wen Hua Gong Si ), a company Ai controlled, had allegedly evaded taxes and intentionally destroyed accounting documents. State media also reports that Ai was granted bail on account of Ai's "good attitude in confessing his crimes", willingness to pay back taxes, and his chronic illnesses. According to the Chinese Foreign Ministry, he is prohibited from leaving Beijing without permission for one year. Ai's supporters widely viewed his detention as retaliation for his vocal criticism of the government. On 23 June 2011, professor Wang Yujin of China University of Political Science and Law stated that the release of Ai on bail shows that the Chinese government could not find any solid evidence of Ai's alleged "economic crime". On 24 June 2011, Ai told a Radio Free Asia reporter that he was thankful for the support of the Hong Kong public, and praised Hong Kong's conscious society. Ai also mentioned that his detention by the Chinese regime was hellish (Chinese: Jiu Si Yi Sheng ), and stressed that he is forbidden to say too much to reporters.  After his release, his sister gave some details about his detention condition to the press, explaining that he was subjected to a kind of psychological torture: he was detained in a tiny room with constant light, and two guards were set very close to him at all times, and watched him constantly. In November, Chinese authorities were again investigating Ai and his associates, this time under the charge of spreading pornography. Lu was subsequently questioned by police, and released after several hours though the exact charges remain unclear. In January 2012, in its International Review issue Art in America magazine featured an interview with Ai Weiwei at his home in China. J.J. Camille (the pen name of a Chinese-born writer living in New York), "neither a journalist nor an activist but simply an art lover who wanted to talk to him" had travelled to Beijing the previous September to conduct the interview and to write about his visit to "China's most famous dissident artist" for the magazine.  On 21 June 2012, Ai's bail was lifted. Although he is allowed to leave Beijing, the police informed him that he is still prohibited from traveling to other countries because he is "suspected of other crimes," including pornography, bigamy and illicit exchange of foreign currency. Until 2015, he remained under heavy surveillance and restrictions of movement, but continues to criticize through his work. In July 2015, he was given a passport and may travel abroad.

What did he release?
On 22 June 2011, the Chinese authorities released Ai from jail after almost three months' detention on charges of tax evasion.