How do I get to Newark Airport from Penn Station?

Related questions

1. How often do trains run from Penn Station to Newark Airport?
2. How often does the Newark AirTrain run?
3. How often does the AirTrain run at Newark?
4. Is Jersey City a safe place to live?
5. How far is Jersey Shore from NYC?
6. How Safe Is Jersey City?
7. How do I get from New York to New Jersey by train?
8. Can I smoke in Newark airport?
9. Does the subway run from New Jersey to New York?
10. Can I store my luggage at Newark airport?

Tags

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8. #newark
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10. #transfer
11. #amtrak
12. #every
13. #expensive
14. #liberty
15. #airport
16. #ticket
17. #hours
18. #train
19. #because