Lieutenant, a commissioned officer. In the United States Army, Air Force, and Marine Corps, lieutenants are the lowest-ranking commissioned officers. There are two grades, second lieutenant (the lower) and first lieutenant. In the Navy and Coast Guard, lieutenants rank above ensigns and below lieutenant commanders. Lieutenant junior grade is equivalent to an Army first lieutenant, and lieutenant is equivalent to an Army captain Originally the term lieutenant referred to any official, civil or military, who took the place of a superior.
Picture yourself deep behind enemy lines, taking calculated risks to gather information about the enemy. This is Army reconnaissance work. How can you earn yourself a spot among the reconnaissance ranks?
The idea of anyone messing with your mind probably makes you nervous. But what if doctors could put that power to good use without drilling a hole through your skull?