Osan Airmen train, compete in Jiu-jitsu tournament

U.S. Air Force Staff Sgt. Christopher Costa, 51st Communications Squadron radio frequencies transmissions systems supervisor, observes his students practicing Brazilian jiu-jitsu at Osan Air Base, Republic of Korea, Nov. 21, 2016. Costa teaches jiu-jitsu to team Osan members on-base during his off-duty hours. (U.S. Air Force photo by Staff Sgt. Jonathan Steffen)

U.S. Air Force Staff Sgt. Christopher Costa, 51st Communications Squadron radio frequencies transmissions systems supervisor, observes his students practicing Brazilian jiu-jitsu at Osan Air Base, Republic of Korea, Nov. 21, 2016. Costa teaches jiu-jitsu to team Osan members on-base during his off-duty hours. (U.S. Air Force photo by Staff Sgt. Jonathan Steffen)

U.S. Air Force Staff Sgt. Christopher Costa, top, 51st Communications Squadron radio frequencies transmissions systems supervisor, demonstrates a submission move on Staff Sgt. Devin Fields, 607th Support Squadron NCO in charge Kunsan element, during a Brazilian jiu-jitsu class at Osan Air Base, Republic of Korea, Nov. 21, 2016. Costa prepared and trained Airmen that participated in the Dumau Jiu-Jitsu Korea Grand Prix 2016 in Seoul on Nov. 27, 2016. (U.S. Air Force photo by Staff Sgt. Jonathan Steffen)

U.S. Air Force Staff Sgt. Christopher Costa, top, 51st Communications Squadron radio frequencies transmissions systems supervisor, demonstrates a submission move on Staff Sgt. Devin Fields, 607th Support Squadron NCO in charge Kunsan element, during a Brazilian jiu-jitsu class at Osan Air Base, Republic of Korea, Nov. 21, 2016. Costa prepared and trained Airmen that participated in the Dumau Jiu-Jitsu Korea Grand Prix 2016 in Seoul on Nov. 27, 2016. (U.S. Air Force photo by Staff Sgt. Jonathan Steffen)

U.S. Air Force Staff Sgt. Brandon Davis (center), 51st Fighter Wing chaplain assistant, poses with his first place medal for master open weight white belt during the Dumau Jiu-Jitsu Korea Grand Prix 2016 in Seoul, Republic of Korea, Nov. 27, 2016. Davis won the master open weight white belt by beating 14 other competitors in a single-round eliminations competition. (U.S. Air Force photo by Staff Sgt. Jonathan Steffen)

U.S. Air Force Staff Sgt. Brandon Davis (center), 51st Fighter Wing chaplain assistant, poses with his first place medal for master open weight white belt during the Dumau Jiu-Jitsu Korea Grand Prix 2016 in Seoul, Republic of Korea, Nov. 27, 2016. Davis won the master open weight white belt by beating 14 other competitors in a single-round eliminations competition. (U.S. Air Force photo by Staff Sgt. Jonathan Steffen)

U.S. Air Force Staff Sgt. Brandon Davis, 51st Fighter Wing chaplain assistant, takes down Nam-Hyun Cho during a master ultra-heavy weight white belt Jiu-Jitsu match during the Dumau Jiu-Jitsu Korea Grand Prix 2016 in Seoul, Republic of Korea, Nov. 27, 2016. Davis won the master ultra-heavy white belt class and also won master open weight white belt class. (U.S. Air Force photo by Staff Sgt. Jonathan Steffen)

U.S. Air Force Staff Sgt. Brandon Davis, 51st Fighter Wing chaplain assistant, takes down Nam-Hyun Cho during a master ultra-heavy weight white belt Jiu-Jitsu match during the Dumau Jiu-Jitsu Korea Grand Prix 2016 in Seoul, Republic of Korea, Nov. 27, 2016. Davis won the master ultra-heavy white belt class and also won master open weight white belt class. (U.S. Air Force photo by Staff Sgt. Jonathan Steffen)

U.S. Air Force Senior Airman Kate West, 51st Medical Operations Squadron medical technician, pulls guard against Eunju Shin during a feather-weight white belt Jiu-Jitsu match during the Dumau Jiu-Jitsu Korea Grand Prix 2016 in Seoul, Republic of Korea, Nov. 27, 2016. This was West’s first tournament after training for the last ten months at Osan. (U.S. Air Force photo by Staff Sgt. Jonathan Steffen)

U.S. Air Force Senior Airman Kate West, 51st Medical Operations Squadron medical technician, pulls guard against Eunju Shin during a feather-weight white belt Jiu-Jitsu match during the Dumau Jiu-Jitsu Korea Grand Prix 2016 in Seoul, Republic of Korea, Nov. 27, 2016. This was West’s first tournament after training for the last ten months at Osan. (U.S. Air Force photo by Staff Sgt. Jonathan Steffen)

U.S. Air Force Senior Airman Kazuhito Ikematsu(top), 607th Support Squadron tactical satellite communications technician, rolls with Lee Won in an open weight blue belt Jiu-Jitsu match during the Dumau Jiu-Jitsu Korea Grand Prix 2016 in Seoul, Republic of Korea, Nov. 27, 2016. In addition to competing in the blue belt open weight class, Ikematsu also competed in the medium heavy weight class. (U.S. Air Force photo by Staff Sgt. Jonathan Steffen)

U.S. Air Force Senior Airman Kazuhito Ikematsu(top), 607th Support Squadron tactical satellite communications technician, rolls with Lee Won in an open weight blue belt Jiu-Jitsu match during the Dumau Jiu-Jitsu Korea Grand Prix 2016 in Seoul, Republic of Korea, Nov. 27, 2016. In addition to competing in the blue belt open weight class, Ikematsu also competed in the medium heavy weight class. (U.S. Air Force photo by Staff Sgt. Jonathan Steffen)

U.S. Air Force Master Sgt. Thomas Matzke, right, 607th Air Support Operations Group tactical air control party, defends against Kim San during a senior open weight class blue belt Jiu-Jitsu match during the Dumau Jiu-Jitsu Korea Grand Prix 2016 in Seoul, Republic of Korea, Nov. 27, 2016. Matzke was one of four Airmen from Osan to compete in the jiu-jitsu tournament. (U.S. Air Force photo by Staff Sgt. Jonathan Steffen)

U.S. Air Force Master Sgt. Thomas Matzke, right, 607th Air Support Operations Group tactical air control party, defends against Kim San during a senior open weight class blue belt Jiu-Jitsu match during the Dumau Jiu-Jitsu Korea Grand Prix 2016 in Seoul, Republic of Korea, Nov. 27, 2016. Matzke was one of four Airmen from Osan to compete in the jiu-jitsu tournament. (U.S. Air Force photo by Staff Sgt. Jonathan Steffen)

Osan Air Base, Republic of Korea -- U.S. Air Force Staff Sgt. Christopher Costa, 51st Communications Squadron radio frequencies transmissions systems supervisor, observes his students practicing Brazilian jiu-jitsu at Osan Air Base, Republic of Korea, Nov. 21, 2016. Costa teaches jiu-jitsu to team Osan members on-base during his off-duty hours. (U.S. Air Force photo by Staff Sgt. Jonathan Steffen)