University of Missouri students circle tents on the Carnahan Quadrangle, locking arms to prevent media from entering the space following the resignation of President Timothy Wolfe on Monday. Robert Cohen/TNS/Landov hide caption

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People attend a candlelight vigil in front of the WDBJ-TV station in Roanoke, Va. a day after reporter Alison Parker and cameraman Adam Ward from the station were killed during a live broadcast. Don Petersen/AP hide caption

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John Carroll speaks at the International Women's Media Foundation's 15th Annual Courage in Journalism Awards in 2004 in Beverly Hills, Calif. The former editor of the Los Angeles Times died Sunday at age 73. Vince Bucci/Getty Images hide caption

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Journalist Brian Williams hosts The Lincoln Awards: A Concert For Veterans & The Military Family on Jan. 7 at John F. Kennedy Center for the Performing Arts in Washington. Recent reports suggest the suspended NBC anchor may have embellished several of his stories. Paul Morigi/Getty Images Entertainment hide caption

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Jason Rezaian, an Iranian-American correspondent for the Washington Post, faces four serious charges, including espionage, according to his lawyer. He's shown in 2013. Vahid Salemi/AP hide caption

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Arianna Huffington, president and editor-in-chief of The Huffington Post Media Group, speaks at the 2014 World Economic Forum. Reporters and editors in 15 countries will contribute to "What Works," her site's new initiative focused on covering positive news. Ruben Sprich/Reuters/Landov hide caption

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Congolese editor Solange Lusiku Nsimire says journalism is a powerful way of building and preserving her troubled country's "collective memory." Sylvain Muyali/Courtesy of IWMF hide caption

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Ben Bradlee, then-executive editor of The Washington Post, looks at the front page of the newspaper, headlined "Nixon Resigns," in the composing room on Aug. 8, 1974. David R. Legge/Washington Post/Getty Images hide caption

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Drone Journalism Lab researcher Ben Kreimer is limited to testing drones indoors. Courtesy of Drone Journalism Lab hide caption

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