Why did Don Cheadle replace Terrance Howard in Iron Man?

Related questions

1. Why did they replace Terrence Howard?
2. Did Tony Stark remove the shrapnel?
3. Will Iron Man be recast?
4. Who else auditioned for friends?
5. Why is Iron Man's blood toxic?
6. Who auditioned for Ironman?
7. Why did rhodey get recast?
8. Does Tony Stark have PhD?
9. What happened to Iron Man's heart?
10. What did Tony Stark replace palladium with?

Tags

1. #empire
2. #claimed
3. #producers
4. #agent
5. #downey
6. #cheadle
7. #sequel
8. #howard
9. #drama
10. #friend
11. #movie
12. #asked
13. #tried
14. #replaced
15. #played
16. #salary