(For some German historians, this is the beginning of the "Battle of Britain.") 14: British scientist Sir Henry Tizard leaves for the United States on the Tizard Mission, giving over to the Americans a number of top secret British technologies including the magnetron, the secret device at the heart of radar.
(Bagi sejumlah sejarawan Jerman, ini adalah awal "Pertempuran Britania." 14: Ilmuwan Britania, Sir Henry Tizard, pergi ke Amerika Serikat dalam Misi Tizard, memberikan Amerika beberapa teknologi rahasia Britania termasuk magnetron, alat rahasia di jantung radar.