Before revision: History Wernher von Braun spoke of the necessity ( and the underdevelopment ) of space logistics as early as 1960:" We have a logistics problem coming up in space ... that will challenge the thinking of the most visionary logistics engineers.
After revision: History Wernher von Braun spoke of the necessity ( and the underdevelopment ) of space logistics :As early as 1960, We have a logistics problem coming up in space ... that will challenge the thinking of the most visionary logistics engineers.