What do airport scanners see?

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Tags

1. #radio
2. #reflects
3. #waves
4. #scanner
5. #backscatter
6. #which
7. #scanners
8. #millimeter
9. #types
10. #image
11. #there
12. #radiation
13. #frequency
14. #shows
15. #detect
16. #under
17. #human
18. #clothes
19. #objects
20. #hidden