Which cosmodrome, located in the steppe of present-day Kazakhstan, has been the primary launch site for crewed missions since the beginning of the space age?

• A Plesetsk
• B Baikonur ✓
• C Vostochny
• D Kapustin Yar

Baikonur Cosmodrome was built in the 1950s in the Kazakh SSR; it remains under lease and has launched every crewed mission from Sputnik through to modern ISS expeditions.