NASA policy, responsibility and authority to guard the Earth against any harmful contamination or adverse changes in its environment resulting from personnel, spacecraft and other property returning to the Earth after landing on or coming within the atmospheric envelope of a celestial body; and 2. security requirements, restrictions and safeguards that are necessary in the interest of national security.

The provisions of this part to all NASA manned and unmanned space missions which land or come within the atmospheric envelope of a celestial body and return to the Earth.

She was walking all alone
Down the street in the alley
...
She never saw it
When she was hit by space junk