Claim: Horst Wenninger  (1938 - 16 July 2020) was a German physicist who took active part in the TESLA collaboration and retired from European Organization for Nuclear Research (CERN) in September 2003.
Evidence: Horst Artur Wenninger (1938 - 2020) was a German physicist who spent most of his career at CERN. He retired from CERN in September 2003. During his last years of career he also took active part in the TESLA collaboration, which was merged into the International Linear Collider project. Horst Wenninger passed away on 16 July 2020. The European Organization for Nuclear Research (French: Organisation européenne pour la recherche nucléaire), known as CERN (/sɜːrn/; French pronunciation: ​[sɛʁn; derived from the name Conseil européen pour la recherche nucléaire), is a European research organization that operates the largest particle physics laboratory in the world.