Answer:
<h2>
17</h2>
Explanation:
1 Vice President
2 Speaker of the House of Representatives
3 President pro tempore of the Senate
4 Secretary of State
5 Secretary of the 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
--- Secretary of Transportation
14 Secretary of Energy
15 Secretary of Education
16 Secretary of Veterans Affairs
17 Secretary of Homeland Security
