Walter Joseph Karbo (August 14, 1915 – March 23, 1993) was an American professional wrestling promoter and co-founder of the American Wrestling Association with Verne Gagne.
 A longtime promoter in the Minneapolis-area, Karbo was a close associate of Tony Stecher and attended the first meeting of the National Wrestling Alliance held by Stecher in 1948.
Gregory Alan Gagne ( ; born July 27, 1948) is a retired American professional wrestler.
 He is the son of Verne Gagne.
 In the late 1970s and early 1980s, he achieved his biggest success as one half of the tag team The High Flyers with Jim Brunzell.
 The High Flyers enjoyed a number of high-profile feuds within the AWA with the likes of Bobby Duncum and Blackjack Lanza, Pat Patterson and Ray "The Crippler" Stevens, The East-West Connection (Adrian Adonis and Jesse "The Body" Ventura), and The Shieks (Ken Patera and Jerry Blackwell).
The American Wrestling Association (AWA) was an American professional wrestling promotion based in Minneapolis, Minnesota that ran from 1960 to 1991.
 It was owned and founded by Verne Gagne and Wally Karbo.
 The territory was originally part of the National Wrestling Alliance (NWA), becoming an independent territory in the late 1950s.
Johnny Powers (born Dennis Waters, March 20, 1943) is a retired Canadian professional wrestler, known by his legally changed ring name Johnny Powers.
 He competed in several North American and International promotions including National Wrestling Alliance (NWA), American Wrestling Association (AWA), Maple Leaf Wrestling, National Wrestling Federation, International Wrestling Association and the World Wide Wrestling Federation feuding with then WWWF World Heavyweight Champion Bruno Sammartino during the early 1960s NWA's Lou Thesz, Gene Kiniski and AWA's Verne Gagne.
JT Southern (born July 4, 1964) is a retired American professional wrestler.
 Though he achieved most notoriety during his 1992 feud with Van Hammer in World Championship Wrestling, Southern also competed for Verne Gagne's American Wrestling Association, Continental Wrestling Association (CWA) in Memphis, Tennessee, and in UWF International in Japan.
Laverne Clarence Gagne ( ; February 26, 1926 – April 27, 2015) was an American professional wrestler, football player, wrestling trainer, and wrestling promoter.
 He was the owner and promoter of the Minneapolis-based American Wrestling Association (AWA), the predominant promotion throughout the Midwest and Manitoba for many years.
 He remained in this position until 1991, when the company folded.
Frederick Koch (January 6, 1903 - August 24, 1969), known professionally as Fred Kohler, was an American wrestling promoter who produced the popular DuMont Television Network program "Wrestling From Marigold" (1949-1955).
 Kohler promoted matches in Chicago, Illinois for over thirty years and was responsible for such talents as Verne Gagne and promoter Jim Barnett.
 He was also president of the National Wrestling Alliance from 1961 to 1962.
The AWA United States Championship was a short-lived title in the early days of the American Wrestling Association.
 It started out as the NWA United States Championship promoted in the Chicago, Illinois from 1953 until 1958.
 in 1958 then champion Verne Gagne created the American Wrestling Association (AWA) based on Minneapolis, Minnesota and took the championship with him, claiming the lineage of the Chicago version.
 The Chicago promotion recognized Wilbur Snyder as their next champion, splitting the lineage into their own NWA United States Heavyweight Championship.
 The Minneapolis version of the championship was renamed the AWA United States Championship in 1960.
Break The Barrier was a professional wrestling supercard held at Viking Hall, better known as the ECW Arena, in Philadelphia, Pennsylvania on May 15, 1999.
 The event was organized by the founders of Scoopswrestling.com, Al Isaacs, Remy Arteaga and Barbi Bistrowitz, and brought together some of the top independent wrestlers from around the country.
 It was one of the biggest interpromotional events in the United States and represented by 12 independent promotions including Allied Powers Wrestling Federation, Combat Zone Wrestling, Extreme Championship Wrestling, Independent Pro Wrestling, Independent Professional Wrestling Alliance, Maryland Championship Wrestling, Music City Wrestling, NWA New Jersey, New Dimension Wrestling, South's Greatest Wrestling Fans, Steel City Wrestling, World Legion Wrestling and World Wrestling Organization.
 Pro Wrestling Illustrated has called it "one of the greatest Supercards of all time".
The Wrestler is a 1974 independent film produced by professional wrestler Verne Gagne and W.R. Frank, starring Ed Asner as "Frank Bass", a wrestling promoter.
 Verne Gagne also stars in the movie as Mike Bullard, the current wrestling champion of his "league."
 After a long reign as champion, Bullard is getting older and feeling pressure from all sides, including his wife and wrestling promoters, to pass the championship to Billy Taylor and retire.
 Bullard's resistance to their requests that he step aside is the central conflict in the film.
 The movie presents professional wrestling as a truly competitive sport, always maintaining the illusion that matches are a result of athletic combat and not pre-determined outcomes decided before the matches.

Question: JT Southern and Verne Gagne were both affiliated with what wrestling organization?
Answer: American Wrestling Association