When Apollo 11 astronauts landed on the Moon 40 years ago this month, they were more than just Americans taking that historic first step on to another celestial body.They did plant the American flag there, acknowledging the nation whose tax payers had financed the massive operation. To allay any fears that one nation was claiming the Moon — which was explicitly ruled out by the Outer Space Treaty of 1967 — they also left a plaque...
