Answer the question at the end by quoting:

Oscar McKinley Charleston (October 14, 1896 - October 5, 1954) was an American center fielder and manager in Negro league baseball. In 1915, after serving three years in the U.S. Army, the Indianapolis, Indiana, native continued his baseball career as a professional with the Indianapolis ABCs; his career ended in 1954 as a player-manager for the Indianapolis Clowns. In addition to a forty-three-year career with more than a dozen teams, including the Homestead Grays and the Pittsburgh Crawfords, Negro league baseball's leading teams in the 1930s, he played nine winter seasons in Cuba and in numerous exhibition games against white major leaguers. Charleston was known for his strengths as a hitter and center fielder.
In early October 1954, Charleston fell ill due to a heart attack or stroke. He was admitted to a Philadelphia, Pennsylvania, hospital, and died on October 5, 1954, at the age of fifty-seven. Charleston's remains are buried at Floral Park Cemetery in Indianapolis, Indiana.  Charleston was one of the early Negro league baseball stars. By 1920 he was generally considered as "the greatest center fielder and one of the most reliable sluggers in black baseball." A renowned players of his era, Charleston was recognized for his athletic skills as a powerful, hard-hitting slugger, his speed and aggressiveness as a base runner, and as a top outfielder. He was also an "intense" player with a "volatile temper." Charleston's observers often compared his play to his contemporaries, such as [[Ty Cobb], Tris Speaker, and Babe Ruth. Charleston ranks among Negro league baseball's top five players in home runs and batting averages, and its leader in stolen bases.  Baseball writer Bill James, author of The New Bill James Historical Baseball Abstract (2001), reported that Charleston "did everything exceptionally well" and considered him one of the gam'es top centerfielders. James ranked Charleston as the fourth-best player of all-time behind Ruth, Honus Wagner, and Willie Mays. In addition, numerous baseball historians, sportswriters, and fellow players consider Charleston as possibly the greatest all-around Negro league ballplayer and one of the greatest players in history. In addition to James, these include former New York Giants manager John McGraw; Charleston's contemporaries, Juanelo Mirabal, Buck O'Neill, and Norman "Turkey" Stearnes; sportswriter Grantland Rice; and other baseball experts. The Sporting News list of the 100 greatest baseball players, which was published in 1998, ranked Charleston sixty-seventh. Only four other black ballplayers who played all or most of their careers in pre-1947 Negro leagues placed higher on the list: Josh Gibson, Satchel Paige, Buck Leonard, and Cool Papa Bell. In 1999 Charleston He was also nominated as a finalist for Major League Baseball's All-20th Century Team..

How did Oscar die?

Charleston fell ill due to a heart attack or stroke.

IN: Al-Awlaki was born in Las Cruces, New Mexico, in 1971 to parents from Yemen, while his father, Nasser al-Awlaki, was doing graduate work at U.S. universities. His father was a Fulbright Scholar who earned a master's degree in agricultural economics at New Mexico State University in 1971, received a doctorate at the University of Nebraska, and worked at the University of Minnesota from 1975 to 1977. Nasser al-Awlaki served as Agriculture Minister in Ali Abdullah Saleh's government. He was also President of Sana'a University.

In July 2010, al-Awlaki's father, Nasser al-Awlaki, contacted the Center for Constitutional Rights and the American Civil Liberties Union to represent his son in a lawsuit that sought to remove Anwar from the targeted killing list. ACLU's Jameel Jaffer said:  the United States is not at war in Yemen, and the government doesn't have a blank check to kill terrorism suspects wherever they are in the world. Among the arguments we'll be making is that, outside actual war zones, the authority to use lethal force is narrowly circumscribed, and preserving the rule of law depends on keeping this authority narrow.  Lawyers for Specially Designated Global Terrorists must obtain a special license from the US Treasury Department before they can represent their clients in court. The lawyers were granted the license on August 4, 2010.  On August 30, 2010, the groups filed a "targeted killing" lawsuit, naming President Obama, CIA Director Leon Panetta, and Secretary of Defense Robert Gates as defendants. They sought an injunction preventing the targeted killing of al-Awlaki, and also sought to require the government to disclose the standards under which US citizens may be "targeted for death". Judge John D. Bates dismissed the lawsuit in an 83-page ruling, holding that the father did not have legal standing to bring the lawsuit, and that his claims were judicially unreviewable under the political question doctrine inasmuch as he was questioning a decision that the US Constitution committed to the political branches.  On May 5, 2011, the US tried but failed to kill al-Awlaki by firing a missile from an unmanned drone at a car in Yemen. A Yemeni security official said that two al-Qaeda operatives in the car died.

what was the reason behind the lawsuit?

OUT:
contacted the Center for Constitutional Rights and the American Civil Liberties Union to represent his son in a lawsuit that sought to remove Anwar from the targeted killing list.