The crucial factor in the size and shape of the Shuttle Orbiter was the requirement that it be able to accommodate the largest planned commercial and classified satellites, and have the cross-range recovery range to meet classified USAF missions requirement for a one-around abort for a polar launch.
Tips for printing coloring book page or coloring sheet:
Step 1: Click on "Print" link of your choice, if you want a
Space missions image for coloring yourself then you need to click on "Print
Space missions Coloring page (B/W)" link. If you want colored (already filled with colors)
Space missions graphic to print then click "Print
Space missions Coloring page (Color)".
Step 2: Now a new pop-up window will open along the
Space missions image of your choice (if new window does not open-up then you may need to check your pop-up blocker settings.). Now click on "PRINT". This will open printer dialog, select your print and print.