Why are planes always delayed?

Related questions

1. Is 4am a midnight?
2. Is it 0000 or 2400?
3. Is it 12 am tomorrow or today?
4. Should AM and PM be capitalized?
5. Does midnight belong to today or tomorrow?
6. Is 12 midnight the next day?
7. Is 12 30 at night AM or PM?
8. Do you lose a day flying to Japan?
9. What means AM and PM?
10. How do you write PM?

Tags

1. #security
2. #interesting
3. #system
4. #means
5. #notices
6. #because
7. #supporting
8. #could
9. #planes
10. #delays
11. #weather
12. #industry
13. #optimized
14. #issues
15. #airline
16. #amount
17. #argument
18. #caused
19. #lower