By the autumn of 1943 the bomber groups of the Eighth US Army Air Force (USAAF) based in England faced a crisis.

1943年秋，驻扎在英国的美国陆军航空兵(USAAF)第8航空队下属的轰炸机大队面临着一场危机。

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Last week's order to ground the planes - in the US air force, army and Marine Corps - marked the second time in two months planes from the F-35 range have been grounded.

BBC: Grounded US F-35 fighter jet fleet to resume flights