Why did hydra kill Howard Stark?

Related questions

1. Who is the world's highest paid actress?
2. How long were Ashton and Demi together?
3. Did Jarvis die?
4. What is Chris Evans sign?
5. What is Scarlett Johansson's race?
6. Was Ashton Kutcher a twin?
7. Who is Scarlett Johansson's boyfriend?
8. Who played the daughter in Panic Room?
9. How old was Mila Kunis in That 70s Show?
10. Who kills the Winter Soldier?

Tags

1. #maria
2. #stark
3. #hydra
4. #winter
5. #starks
6. #after
7. #soldier
8. #howard
9. #caused
10. #impact
11. #initial
12. #crash
13. #causing
14. #while
15. #survived
16. #december
17. #deaths
18. #control
19. #under
20. #killing
21. #cause