What is NBC filter?

Related questions

1. Is Al Roker still married?
2. What is the local news?
3. Is CNBC part of NBC?
4. How much did Comcast pay for NBC?
5. What are hazmat suits made of?
6. Where is NBC Nightly News broadcast from?
7. Did Peter Jennings pass away?
8. Did Google shut down?
9. Is NBC News the same as NBC?
10. Who did Lester Holt replaced?

Tags

1. #nuclear
2. #provides
3. #warfare
4. #modes
5. #peace
6. #pressure
7. #filtration
8. #supplied
9. #clean
10. #fresh
11. #citadel
12. #operation
13. #during
14. #allow
15. #contaminates
16. #times
17. #chemical
18. #filtered
19. #conventional
20. #system
21. #biological
22. #combat