Who becomes president of the US when the president should die?

There's a whole line of people just in case more than just the President dies. Here's the list in order of succession:

1. Vice President

2. Speaker of the House

3. President Pro Tempore of the Senate

4. Secretary of State

5. Secretary of Treasury

6. Secretary of Defense

7. Attorney General

8. Secretary of the Interior

9. Secretary of Agriculture

10. Secretary of Commerce

11. Secretary of Labor

12 Secretary of Health and Human Services

13. Secretary of Housing and Urban Development

14. Secretary of Transportation

15. Secretary of Energy

16. Secretary of Education

17. Secretary of Veterans Affairs

18. Secretary of Homeland Security