Why is A&M called the 12th man?

Related questions

1. How much are the Seahawks being sold for?
2. Does the Super Bowl have to be played in a dome?
3. How many draft picks do the Seahawks have?
4. Why does Seattle have the number 12 everywhere?
5. Why are the Seahawks called the 12s?
6. Why is it called Kyle Field?
7. Has Denver hosted a Super Bowl?
8. Who owns the Seahawks now that Paul Allen died?
9. Why did Seahawks move to NFC?
10. How much did Paul Allen pay for the Seahawks?

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1. #stood
2. #outside
3. #standing
4. #student
5. #statue
6. #funded
7. #during
8. #known
9. #north
10. #needed
11. #entire
12. #field
13. #their
14. #called
15. #graduating
16. #support
17. #class
18. #waiting