Chesley Burnett "Sully" Sullenberger III (born January 23, 1951) is an American retired aircraft pilot, diplomat and aviation safety expert. He is best known for his actions as captain of US Airways Flight 1549 on January 15, 2009, when he ditched the plane, landing on the Hudson River after both engines were disabled by a bird strike. All 155 people aboard survived. After the Hudson landing, Sullenberger became an outspoken advocate for aviation safety and helped develop new protocols for flight safety. He served as the co-chairman, along with his co-pilot on Flight 1549, Jeffrey Skiles, of the Experimental Aircraft Association (EAA)'s Young Eagles youth introduction-to-aviation program from 2009 to 2013.

Sullenberger retired from US Airways in 2010, after 30 years as a commercial pilot. In 2011, he was hired by CBS News as an aviation and safety expert.

Sullenberger is the co-author, with Jeffrey Zaslow, of the New York Times bestseller Highest Duty: My Search for What Really Matters, a memoir of his life and of the events surrounding Flight 1549. His second book, Making a Difference: Stories of Vision and Courage from America's Leaders, was published in 2012. He was ranked second in Time's Top 100 Most Influential Heroes and Icons of 2009, after Michelle Obama.

In 2021, President Joe Biden announced he would nominate Sullenberger as U.S. representative to the International Civil Aviation Organization (ICAO) with the rank of ambassador. He was confirmed by unanimous consent in the Senate and served in that role from February 3 to July 1, 2022.

Chesley Burnett Sullenberger III was born January 23, 1951, in Denison, Texas. His father was a descendant of Swiss-German immigrants named Sollenberger (modern spelling is Sollberger) from Wynigen, Switzerland. He has one younger sister, Mary. The street on which he grew up was named after his mother's family. According to his sister, Sullenberger built model planes and aircraft carriers during his childhood; she says he became interested in flying after seeing military jets from an Air Force base near his house. He went to school in Denison and was consistently on the 99th percentile in every academic category.

At age 11, his IQ was deemed high enough that he was allowed to join Mensa International. In high school, he was the president of the Latin club, a first chair flutist, and an honor student. He was an active member of the Waples Memorial United Methodist Church. He graduated from Denison High School in 1969, near the top of his class of about 350. At 16, Sullenberger learned to fly in an Aeronca Champion 7DC at a private airstrip near his home. He said that the training he received from a local flight instructor influenced his aviation career.

Sullenberger earned a Bachelor of Science degree in psychology and basic sciences from the United States Air Force Academy. He earned a master's degree in industrial-organizational psychology from Purdue University in 1973 and a Master of Public Administration from University of Northern Colorado in 1979.

Sullenberger was appointed to the United States Air Force Academy, entering with the Class of 1973 in June 1969. He was selected along with around a dozen other freshmen for a cadet glider program, and by the end of that year, he was an instructor pilot. When he graduated in 1973, he received the Outstanding Cadet in Airmanship award, as the class's "top flyer". Immediately following his graduation with a Bachelor of Science degree and his commissioning as an officer, the Air Force sent Sullenberger to Purdue University to pursue a master's degree prior to entering Undergraduate Pilot Training (UPT).^{[citation needed]}