Senior Airman Princeton Drake, 20th Aircraft Maintenance Unit crew chief, connects a liquid oxygen servicing hose to a filter valve on Barksdale Air Force Base, La., Jan. 8. A B-52H Stratofortress is required to have more than 30 liters of liquid oxygen onboard during flight and is used as breathing oxygen for the aircrew. (U.S. Air Force photo/Airman 1st Class Benjamin Gonsier)
Senior Airman Princeton Drake, 20th Aircraft Maintenance Unit crew chief, prepares a liquid oxygen servicing hose on Barksdale Air Force Base, La., Jan. 8. The B-52 is required to have more than 30 liters of liquid oxygen onboard and is used as breathing oxygen for the aircrew during flight. (U.S. Air Force photo/Airman 1st Class Benjamin Gonsier)
Senior Airman Princeton Drake, 20th Aircraft Maintenance Unit crew chief, connects a liquid oxygen servicing hose to a filter valve on Barksdale Air Force Base, La., Jan. 8. Liquid oxygen is transferred into three converters, each capable of holding up to 25 liters on the B-52H Stratofortress. The liquid oxygen is used to assist aircrew in breathing during flight. (U.S. Air Force photo/Airman 1st Class Benjamin Gonsier)
A caution sign is displayed near a B-52H Stratofortress during liquid oxygen servicing by Senior Airman Princeton Drake, 20th Aircraft Maintenance Unit crew chief, on Barksdale Air Force Base, La., Jan. 8. During this portion of a preflight inspection, personnel are required to stay more than 25 feet away for safety reasons. (U.S. Air Force photo/Airman 1st Class Benjamin Gonsier)
Senior Airman Princeton Drake, 20th Aircraft Maintenance Unit crew chief, services a B-52H Stratofortress as liquid oxygen vents out on Barksdale Air Force Base, La., Jan. 8. The B-52 contains three converters that hold up to 25 liters of liquid oxygen. When a converter is full, liquid oxygen will start to vent out of the aircraft as an indicator to stop. (U.S. Air Force photo/Airman 1st Class Benjamin Gonsier)
Senior Airman Princeton Drake, 20th Aircraft Maintenance Unit crew chief, dons personal protection equipment before servicing liquid oxygen to a B-52H Stratofortress on Barksdale Air Force Base, La., Jan. 8. The B-52 is required to have more than 30 liters of liquid oxygen onboard and is used as breathing oxygen for the aircrew during flight. (U.S. Air Force photo/Airman 1st Class Benjamin Gonsier)