Help with my Career life......?

Hi everyone, im currently a junior right now in high school. And i have all A's and B's. I plan on going to college. Probaly George Washington University or The Citadel. Then i plan on joing the Marine Corps as an Intelligence Officer, but if that doesnt work out i plan on doing joining as Marine Corps Security Guard Force. After that i dont know what i should do, FBI, Secret Serive, Private security contractor.. that where you guys come in to give me some ideas so i dont make a wrong turn. By the way im looking for a job that has action or traveling involve and i dont plan on getting married so no one to slow me down. If you have any job ideas it would be great to hear.