Harold Elstner Talbott, Jr. (March 31, 1888 – March 2, 1957) was the third United States Secretary of the Air Force.
The Under Secretary of the Air Force (USECAF, or SAF/US) is the second-highest ranking civilian official in the Department of the Air Force of the United States of America, serving directly under the Secretary of the Air Force.
 In the absence of the Secretary, the Under Secretary exercises all the powers and duties of the Secretary and serves as Acting Secretary when the position of Secretary is vacant.
 The Under Secretary of the Air Force is appointed by the President, by and with the advice and consent the Senate, to serve at the President's pleasure.
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."
The Air Force Medical Operations Agency (AFMOA), Port San Antonio, Texas (Lackland Annex), oversees execution of the Air Force Surgeon General policies supporting Air Force expeditionary capabilities, healthcare operations, and national security strategy.
 It provides expert consultative leadership support to 75 military treatment facilities and eleven major commands/direct reporting units to ensure cost-effective, modern, and prevention-based healthcare continuum for 2.1 million beneficiaries worldwide.
 The AFMOA directs and supports the clinical currency of 43,131 healthcare professionals providing 6.6 million visits and 133,500 bed days.
 The agency provides clinical and population health data and analysis to AF/SG and MAJCOM surgeons.
 The agency partners with the Assistant Secretary of Defense (Health Affairs), Secretary of the Air Force, Chief of Staff of the Air Force, and the Department of Veterans Affairs.
Lieutenant General George Peach Taylor Jr.
 USAF (Ret.)
 (born 1953) was the 18th Surgeon General of the United States Air Force, Headquarters U.S. Air Force, Washington, D.C. General Taylor served as the senior Air Force officer responsible for comprehensive management of the Air Force Medical Service.
 In this capacity, he advises the Secretary of the Air Force and Air Force Chief of Staff, as well as the Assistant Secretary of Defense for Health Affairs, on matters pertaining to the medical aspects of the air expeditionary force and the health care of 2.6 million Air Force beneficiaries.
 The Surgeon General has authority to commit resources for the Air Force Medical Service, to make decisions affecting the delivery of medical services, and to develop plans, programs and procedures to support worldwide medical service missions.
 The Surgeon General exercises direction, guidance and technical management of more than 42,000 people assigned to 74 medical treatment facilities worldwide.
 From September 7, 2010 - December 22, 2010 he served as the acting Assistant Secretary of Defense for Health Affairs
The United States Air Force Scientific Advisory Board (SAB) is a Federal Advisory Committee that provides independent advice on matters of science and technology relating to the Air Force mission, reporting directly to the Secretary of the Air Force and Chief of Staff of the Air Force.
 In the past, it has provided advice on technologies such as: supersonic aircraft, weather forecasting, satellite communications, medical research, crewless airplanes, and defenses against aircraft and missiles.
 Today, the SAB performs in-depth reviews of the Air Force Research Laboratory's science and technology research, and performs studies on topics tasked by the Secretary and Chief of Staff.
 Members are appointed by the Secretary of Defense.
Dr. Greg Zacharias is the current Chief Scientist of the United States Air Force.
 The position of the Chief Scientist was created over 60 years ago to provide independent scientific advice to the Secretary of the Air Force and the Chief of Staff of the Air Force, as well as to its senior leadership.
 In this role, he works with the top scientists and engineers within the Air Force as well as in academia, industry, and the other armed services to ensure that the Air Force's research and development efforts remain relevant and effective.
 Additionally, as the Chief Scientist he responds to any tasking from the Secretary of the Air Force and the Air Force Chief of Staff on issues or opportunities of a scientific and technical nature that may arise.
 He also interacts with other services and the Office of the Secretary of Defense on issues affecting the Air Force in-house technical enterprise.
 He serves on the Executive Committee of the Air Force Scientific Advisory Board.
 He is the principal science and technology representative of the Air Force to the civilian scientific and engineering community and to the public at large.
Maj. Gen. George G. Finch became the Senior Leader of the US Air National Guard; (Chief of the Air Division National Guard Bureau) (1948-1950) In June 1953 it was reported that Gen. Mark W. Clark would retire and be replaced by Maj. Gen George G. Finch on the UN command delegation to the Korean armistice talks George G. Finch, born April 11, 1902 in Dade City, Florida, is considered one of the pioneers in United States aviation history.
 He began his military career during World War 1, enlisting in the Aviation Section of the Army's Signal Corps in 1918.
 He remained in the Reserve Corps after the war, and in 1926, became Commander, 27th Pursuit Squadron, 1st Pursuit Group.
 In 1940, Georgia Governor Ed Rivers commissioned him to form the first flying unit of the Georgia Air National Guard.
 The unit was mobilized into the U.S. Army in September, 1941, with Major Finch as commander.
 After World War II, he was a leading critic of efforts to eliminate the air arm of the National Guard during peacetime.
 General Finch gained the respect and admiration of Air National Guardsmen throughout the nation with his steadfast support and successful efforts to preserve the Air Guard.
 He became the first Chief of the Air Force Division of the National Guard Bureau in 1948.
 Under his leadership, the Air National Guard built to combat readiness and was among the first components called into service after the outbreak of the Korean War.
 As a result of General Finch's vision and perseverance, 45,000 highly trained officers and airmen of 22 wings and 65 squadrons gave the Air Force the strength it needed in the early, critical phases of the Communist drive down the Korean peninsula.General Finch served as the senior Air Force member of the United Nations negotiating team at the peace talks at Panmunjom, Korea, and received the Legion of Merit for outstanding service in 1955; General Finch assumed command of Fourteenth Air Force, Robins AFB, Georgia, becoming the nation's first Air National Guardsman to head a numbered air force.
 General Finch had a career of "firsts" including the US Army's first night landing with a single, five-million-candlepower floodlight in 1927.
 He also established and endowed the General John P. McConnell Award at the United States Air Force Academy.
 Considered by many as the father of the strong, independent Air National Guard existing today, General Finch retired in 1957.
 No man has had greater impact on the Air Force Reserve and National Guard than has General George G. Finch.A graduate of the University of Georgia and a member of the Georgia Bar, General Finch was enshrined in the Georgia Aviation Hall of Fame May 18, 1996.
Lieutenant General James Gordon Roudebush, USAF, (born February 24, 1948) was the 19th Surgeon General of the United States Air Force, Headquarters U.S. Air Force, Washington, D.C. General Roudebush served as functional manager of the U.S. Air Force Medical Service.
 In this capacity, he advised the Secretary of the Air Force and Air Force Chief of Staff, as well as the Assistant Secretary of Defense for Health Affairs on matters pertaining to the medical aspects of the air expeditionary force and the health of Air Force people.
 General Roudebush had authority to commit resources worldwide for the Air Force Medical Service, to make decisions affecting the delivery of medical services, and to develop plans, programs and procedures to support worldwide medical service missions.
 He exercised direction, guidance and technical management of more than 42,400 people assigned to 74 medical facilities worldwide.
The Office of Inspector General of the Air Force for the United States Air Force is responsible for conducting investigations and inspections as directed by the Secretary of the Air Force and the Chief of Staff of the United States Air Force.
 The position in the Air Force was originally established after World War II as The Air Inspector, which was carried over from the Army Air Forces.
 The current mission of the Air Force Inspector General is prescribed by Title 10 (§ 8020) and Title 32 of the United States Code (§ 105) to develop Air Force and Air National Guard policy to assess readiness, discipline and efficiency with a vision to help shape senior leader decisions affecting the readiness of the Air Force to strengthen the nation's defense.

Question: What number Secretary of the Air Force resigned as a result of Charles L. Bartlett's reporting?
Answer: third