The Soviets also considered manned fly-by missions to Mars and Venus. http://donpmitchell.wordpress.com/2010/02/25/heavy-interplanetary-ship/ http://donpmitche

The Soviets also considered manned fly-by missions to Mars and Venus. http://donpmitchell.wordpress.com/2010/02/25/heavy-interplanetary-ship/ http://donpmitchell.wordpress.com/2010/02/25/heavy-interplan...