Why are flights delayed?

Related questions

1. How many airports are in Atlanta?
2. Does Southwest fly out of Atlanta?
3. How much is the CEO of Delta worth?
4. Can you walk between concourses at Atlanta airport?
5. What wind speed do they cancel flights?
6. Can you stay overnight in Atlanta airport?
7. Is Atlanta the busiest airport in the world?
8. What terminal is Southwest Airlines Atlanta airport?
9. Where does Delta fly from Atlanta?
10. Which terminal is the international terminal at Atlanta airport?

Tags

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