. . . . . . . "The Bachem Ba 349 (BP 20) Natter was a semi expendable rocket powered interceptor developed by Germany during the latter years of World War 2."@en . "Bachem Ba 349 Natter"@en . "The Bachem Ba 349 (BP 20) Natter was a semi expendable rocket powered interceptor developed by Germany during the latter years of World War 2."@en .