When he participated in a festival at the Technical College Aachen which coincided with the 20th anniversary of an assassination attempt on Adolf Hitler
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When he participated in a festival at the Technical College Aachen which coincided with the 20th anniversary of an assassination attempt on Adolf Hitler
Text from Wikipedia, available under CC BY-SA 4.0.
Captured 2026-08-17 from Wikipedia. The archived copy is preserved so this citation survives link rot.