2. http://spaceplace.nasa.gov/en/kids/spinoffs2.shtml

3. http://ethemes.missouri.edu/themes/1744

4. http://articles.cnn.com/2007-10-04/living/nasa.everyday_1_detectors-tires-nasa?_s=PM:LIVING

5. http://space.about.com/od/toolsequipment/ss/apollospinoffs.htm

6. http://space.about.com/od/apollomissions/Apollo_Missions_Information_and_History_of_the_Apollo_Lunar_Missions.htm (contains lots of information about successful and unsuccessful missions)

7. Discoveries as a result of the space program

8. http://techtran.msfc.nasa.gov/at_home.html

9. http://discovery.nasa.gov/

10. http://mufoncentral.com/?page_id=224/space-program/fermi-space-telescope-discoveries/

11. http://dsc.discovery.com/space/my-take/nasa-50th-birthday.html

12. Negative aspects of space exploration

13. http://dsc.discovery.com/space/my-take/nasa-50th-birthday.html (see Experts for info about some cons)

14. http://answers.google.com/answers/threadview/id/35808.html (provides 8 possible negative results of space exploration. There are several links to more specific information about each reason.)

15. http://wiki.answers.com/Q/What_are_the_negative_effects_of_space_exploration (provides 8 possible negatives, each which could be explored futher)

16. http://www.space.com/peopleinterviews/shirley_Q&A_000121.html

17. http://cartome.org/gps-risk.htm

18. http://www.space.com/php/multimedia/imagedisplay/img_display.php?pic=h_space_junk_esa_02,0.gif&cap=The%20distribution%20of%20space%20junk%20around%20Earth

19. Astronaut deaths

20. http://www.chron.com/content/interactive/special/challenger/docs/graphic.html

21. Space Weapons

22. http://www.space.com/businesstechnology/technology/space_war_020515-1.html