On the 40th Anniversary of the Apollo 11 moon landing on Monday, expect a rare glimpse at Neil Armstrong. Though he may be one of the most famous men in the world, he usually avoids the limelight. In the 40 years since he made one giant leap for mankind, Armstrong has turned down an average of 10 monthly interview requests, and he used to hide from autograph-seekers during his tenure at the University of Cincinnati, The Washington Post reports. Armstrong's reticence may have been shaped by the example of Charles Lindbergh, who was Armstrong's guest at the Apollo 11 launch and corresponded with Armstrong until Lindbergh's death in 1974. Armstrong's cool demeanor may have been the reason that NASA top brass chose him over Buzz Aldrin, who campaigned for the honor, to be the first man on the moon.