Question: Charles Leffingwell Bartlett, won the Pulitzer Prize, in which year, for National Reporting "for his original disclosures that led to the resignation of Harold E. Talbott as Secretary of the Air Force."?

Context articles: Carol Hernandez
Charles L. Bartlett (journalist)
Wesley Lowery
Jo Becker
Jack White (reporter)
Scott Higham
Melvin Claxton
Harold E. Talbott
Lucinda Franks
Russell Carollo

Carol Hernandez is an American journalist from Miami Florida.
 She won a 1996 Goldsmith Prize for Investigative Reporting.
 She won the 1996 Pulitzer Prize for National Reporting.
 She currently resides in Long Island with her husband, and three children, (the oldest being the best and most funny and creative).
Charles Leffingwell Bartlett (August 14, 1921 – February 17, 2017) won the 1956 Pulitzer Prize for National Reporting "for his original disclosures that led to the resignation of Harold E. Talbott as Secretary of the Air Force."
Wesley Lowery (born 1990) is a journalist at "The Washington Post".
 He was a lead on the Post's "Fatal Force" project that won the Pulitzer Prize for National Reporting in 2016 as well as the author of "They Can't Kill Us All: Ferguson, Baltimore, and a New Era in America's Racial Justice Movement" (Little, Brown, 2016).
 In 2017, he became a CNN political contributor.
Jo Becker is an award-winning American journalist and author working as an investigative reporter for "The New York Times".
 Formerly with the "Washington Post", she and her colleague there Barton Gellman won the 2008 Pulitzer Prize for National Reporting for a series of articles titled "Angler", which explored the role of Vice President Dick Cheney.
 ("Angler" was a Cheney Secret Service codename.)
 She also shared the 2017 Pulitzer Prize for International Reporting for a New York Times series examining Russian President Vladimir Putin's efforts to project power abroad.
 She is the author of Forcing the Spring: Inside the Fight for Marriage Equality, published by Penguin Press and named one the best non-fiction books of 2014 by the New York Times Sunday Book Review and the Washington Post.
Jack White (1942 – October 12, 2005) was a veteran Rhode Island journalist who won the 1974 Pulitzer Prize in National Reporting for his coverage of President Richard Nixon's underpayment of income taxes.
 White's investigative article prompted Nixon to utter his famous line, "I am not a crook" to White's colleague Joseph Ungaro at a newspaper editors’ conference in Florida.
 White also won Emmy Awards for his reporting on fugitive banker Joe Mollicone and Providence tax officials who violated the city's residency requirement.
 On his death, the Cape Cod Times called him "the dean of Rhode Island journalism."
Scott Higham is a Pulitzer Prize-winning member of "The Washington Post's" investigations unit.
 He has conducted numerous investigations for the news organization, including an examination of abuse at the Abu Ghraib prison, and waste and fraud in Homeland Security contracting.
 The Abu Ghraib investigation was a finalist for the Pulitzer Prize for National Reporting, and the series on contracting won the Investigative Reporters and Editors Award for large newspapers.
 He has also conducted investigations into spending at Guantanamo Bay and conflicts of interests on Capitol Hill.
Melvin L. Claxton (born in 1958) is an American journalist, author, and entrepreneur.
 He has written about crime, corruption, and the abuse of political power.
 He is best known for his 1995 series of investigative reports on corruption in the criminal justice system in the U.S. Virgin Islands and its links to the region's crime rate.
 His series earned the "Virgin Islands Daily News" the Pulitzer Prize for Public Service in 1995.
 Another series by Claxton, this time on the criminal justice system in Detroit, was a finalist for a Pulitzer Prize for Public Service in 2003.
 Claxton has won a number of national reporting awards and his work has been honored several times by the Associated Press managing editors.
 He is the founder and CEO of Epic 4D, an educational video game company.
Harold Elstner Talbott, Jr. (March 31, 1888 – March 2, 1957) was the third United States Secretary of the Air Force.
Lucinda Franks (born 1946) is a former staff writer for "The New York Times", and she has written for "The New Yorker", "The New York Times Magazine", and "The Atlantic".
 Franks is also a winner of the Pulitzer Prize, for her reporting on the life and death of Diana Oughton, a member of The Weathermen, an anti-Vietnam war terrorist group, winning the Pulitzer Prize for National Reporting in 1971 together with Thomas Powers.
 She is the youngest person to win a Pulitzer.
Russell Carollo (born 1955) is a Pulitzer Prize-winning American journalist who has worked as an investigative reporter for the "Dayton Daily News", the "Los Angeles Times", and "The Sacramento Bee".
 He won the 1998 Pulitzer Prize for National Reporting at the "Dayton Daily News" for uncovering mismanagement in military healthcare.
 During his 30-year career, Carollo has reported from at least 17 countries.