A Lockheed Martin F-35 aircraft is seen at the ILA Air Show in Berlin, Germany, April 25, 2018. REUTERS/Axel Schmidt The Israeli Air Force announced a temporary halt in its stealth fighter F-35 aircraft activity on Saturday, following US concerns over defects in pilot ejection systems. Aircraft will undergo inspections that will last a few days, the Israeli Air Force said on Twitter, and any individual F-35 operations will be conducted by special authorisation of the air force chief. The Israeli announcement followed a US notice on Friday of possible defects in the explosive cartridges in pilot ejection systems aboard...