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.
Sure, llamas are our friends. But little did we know that these fuzzy, camel-like creatures might save us all should the End come in the form of a biological attack.
C-4 is in the news quite a bit these days -- it's a powerful explosive that's used in terrorist attacks all over the world. Find out what C-4 explosive is and what it can do.