https://arstechnica.com/information-technology/2017/06/air-force-grounds-f-35a-operations-at-training-base-after-pilots-suffered-hypoxia/
Air Force grounds F-35A operations at training base after pilots suffered hypoxia
After pilots suffer "hypoxia-like symptoms," F-35As at one base are grounded.
The US Air Force's 56th Fighter Wing at Luke Air Force Base in Arizona today cancelled "local flying operations" for F-35A fighters after five incidents in which pilots "experienced hypoxia-like symptoms," an Air Force spokesperson said in a statement. Hypoxia is a deficiency in oxygen reaching the body through the circulatory system.