DescriptionGemini6Back-upCrew - GPN-2000-001832.jpg English: Astronauts John W. Young (left) and Virgil I. "Gus" Grissom take part in training exercises
(Gemini 3).jpg Deutsch: de:John W. Young - de:Gemini 3 English: Astronauts John W. Young (left) takes part in training exercises as the back-upCrew for