F-35 jets remain grounded at U.S. Air Force base in Arizona -USAF
June 12 (Reuters) - The stealthy F-35 fighter jets made by Lockheed Martin Corp remained temporarily grounded at a U.S. Air Force base in Arizona on Monday because of irregularities in pilots' oxygen supplies, an Air Force spokeswoman said.
Training flights were grounded on Friday and had been scheduled to resume on Monday.
The pause in operations continued so the Air Force could study the issue with pilots, maintenance workers and medical professionals, the base spokeswoman said. (Reporting by Mike Stone; Editing by Jonathan Oatis)
