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Liquid oxygen drains into an overflow container on Seymour Johnson Air Force Base, N.C., Jan. 5, 2010. Liquid oxygen is kept at negative 298 degrees Fahrenheit. At that temperature, liquid oxygen can cause things to freeze in a matter of seconds making, the objects extremely brittle. (U.S. Air Force photo/Airman 1st Class Rae Perry)


Colder than ice

Liquid oxygen drains into an overflow container on Seymour Johnson Air Force Base, N.C., Jan. 5, 2010. Liquid oxygen is kept at negative 298 degrees Fahrenheit. At that temperature, liquid oxygen can cause things to freeze in a matter of seconds making, the objects extremely brittle. (U.S. Air Force photo/Airman 1st Class Rae Perry)

Related Imagery
Senior Airman Christopher Lemons, 4th Aircraft Maintenance Squadron avionics technician, attaches an antenna coupler to an F-15E Strike Eagle, Oct. 13, 2015, at Seymour Johnson Air Force Base, North Carolina. The coupler, in conjunction with the Joint Service Electronic Combat Systems Tester, is used to routinely test the effectiveness of the aircraft’s threat detection systems. (U.S. Air Force photo/Senior Airman Aaron J. Jenne)
Senior Airman Jordan Hunt, 4th Aircraft Maintenance Squadron avionics technician, communicates with team members Oct. 13, 2015, at Seymour Johnson Air Force Base, North Carolina, while testing the ALR-56C Radar Warning Receiver System on an F-15E Strike Eagle. The test equipment emits radio frequencies that simulate weapons targeting the aircraft. (U.S. Air Force photo/Senior Airman Aaron J. Jenne)
Staff Sgt. Andrew Menkes, 4th Aircraft Maintenance Squadron avionics technician, attaches cables to a component of the Joint Service Electronic Combat Systems Tester on Oct. 13, 2015, at Seymour Johnson Air Force Base, North Carolina. Avionics technicians use the JSECST equipment to test the effectiveness of the ALR-56C Radar Warning Receiver System. (U.S. Air Force photo/Senior Airman Aaron J. Jenne)
Senior Airman Jordan Hunt, 4th Aircraft Maintenance Squadron avionics technician, affixes an antenna to the wing of an F-15E Strike Eagle on Oct. 13, 2015, at Seymour Johnson Air Force Base, North Carolina. Avionics technicians are required to test the ALR-56C Radar Warning Receiver Systems every 180 days. As the aircraft’s primary defensive system, it detects incoming enemy radio transmissions and alerts aircrews they’re being targeted. (U.S. Air Force photo/Senior Airman Aaron J. Jenne)
Avionics technicians assigned to the 4th and 414th Aircraft Maintenance Squadrons inspect the Joint Service Electronic Combat Systems Tester on Oct. 13, 2015, at Seymour Johnson Air Force Base, North Carolina. The JSECST equipment is used to test the ALR-56C Radar Warning Receiver, the aircraft’s primary defensive system, which detects enemy radio transmissions and alerts aircrews they’re being targeted. (U.S. Air Force photo/Senior Airman Aaron J. Jenne)
Avionics Airmen assigned to the 4th and 414th Aircraft Maintenance Squadrons prepare to test the threat detection systems on an F-15E Strike Eagle Oct. 13, 2015, at Seymour Johnson Air Force Base, North Carolina. The ALR-56C Radar Warning Receiver System requires testing every 180 days to ensure pilot safety. (U.S. Air Force photo/Senior Airman Aaron J. Jenne)
Two Airmen from the 4th Civil Engineer Squadron hold their kids upon their return from deployment, Oct. 13, 2015, at Seymour Johnson Air Force, North Carolina. Airmen across the force continue to support contingencies around the world. (U.S. Air Force photo/Airman Shawna L. Keyes)
Airman 1st Class Troy Caillier (left), 4th Civil Engineer Squadron firefighter, practices taking blood pressure on Airman Tom Krasinski’s, 4th CES firefighter, Sept. 25, 2015, at Seymour Johnson Air Force Base, North Carolina. As first responders, firefighters are trained to react to medical emergencies as it’s possible they will have first contact with a victim. (U.S. Air Force photo/ Airman 1st Class Ashley Williamson)
Firefighters from the 4th Civil Engineer Squadron respond to a call at the base gym, Sept. 25, 2015, at Seymour Johnson Air Force Base, North Carolina. Roughly 70 Airmen at the fire department are responsible for more than 13,000 personnel and more than 100 aircraft on base. (U.S. Air Force photo/Airman 1st Class Ashley Williamson)
Fire trucks line up outside the bay doors of the 4th Civil Engineer Squadron fire department, Sept. 18, 2015, at Seymour Johnson Air Force Base, North Carolina. As part of their shift, Airmen are required to check all trucks and equipment and wash the vehicles before shift changes. (U.S. Air Force photo/Airman Shawna L. Keyes)
Airmen from the 4th Civil Engineer Squadron fire department make plates of food during their down time, Sept. 17, 2015, at Seymour Johnson Air Force Base, North Carolina. Since the Airmen work 24-hour shifts and are unable to leave their post, they commonly cook and share their own meals in the department’s kitchen. (U.S. Air Force photo/Airman Shawna L. Keyes)
Airman 1st Class Troy Caillier (left), and Airman Tom Krasinski, 4th Civil Engineer Squadron firefighters, simulate rescuing a downed firefighter, Sept. 17, 2015, at Seymour Johnson Air Force Base, North Carolina. Firefighters are required to conduct various types of training to keep their certifications current. (U.S. Air Force photo/Airman Shawna L. Keyes)