"US F-35 fighter jets grounded indefinitely at Arizona base"
Luke Air Force Base northwest of Phoenix is home to the 56th Fighter Wing. The base cancelled local flying operations for its F-35A Lightning II aircraft due to five incidents in which pilots experienced symptoms resembling hypoxia, or oxygen deprivation, the Air Force spokesman, Captain Mark Graff, said at the Pentagon on Friday.
US F-35 fighter jets grounded indefinitely at Arizona base
Not all F-35s seem to be affected.