Jack Edmondson p3

2. designed to resist the penetration of bullets.
4. a leveled strip of smooth ground along which aircraft take off and land.
5. of or from outside the earth or its atmosphere.
6. accept or admit the existence or truth of.
9. the air available to aircraft to fly in, especially the part subject to the jurisdiction of a particular country.
11. the action of transporting someone or something or the process of being transported.
13. the fact or condition of functioning or being active.
16. the ability to acquire and apply knowledge and skills.
18. an event or occurrence.
20. the forming of a theory or conjecture without firm evidence.
21. the work done by, or the occupation of, an engineer

1. a deputy or substitute acting for a superior.
3. in a way that lasts or remains unchanged indefinitely; for all time.
7. relating to the nucleus of an atom.
8. relating to or resembling photographs.
10. a vehicle used for space travel.
12. a celestial body orbiting the earth or another planet.
14. the height of an object or point in relation to sea level or ground level.
15. machinery and equipment developed from the application of scientific knowledge.
17. the process of developing or being developed.
19. a political theory derived from Karl Marx, advocating class war and leading to a society in which all property is publicly owned and each person works and is paid according to their abilities and needs.