International Affairs that encompasses several areas from homeland security, intelligence, and diplomacy to NGOs and counterterrorism. The knowledge, skills, and abilities acquired in IA are useful for government, military, NGO, and private sectors.
Advice for those interested in working in this industry
Be willing to travel. this can take a toll on relationships. Be of the highest character. You can't obtain and maintain a proper level security clearance otherwise. Keep a low profile if you want to work in sensitive areas. You don't want to become a target for adversarial collection.