"We were planning on adding more solar panels to the ISS, but we thought there might be too much lag." "We had planned to go to Mars, but halfway through it seemed like it would be easier to go to Jupiter, so we went there instead" "The Moon landing was a complete success, except we forgot to put legs on the lander.......so everyone is kind of dead now. NEXT QUESTION!" "We errrrr.....we kinda rolled the Mars rover" "No we do not consider forgetting to put docking ports on the space craft to be