I'm working on a project that will compile some of the most iconic elements of the United States of America (e.g. Statue of Liberty, Mount Rushmore, the Navy, the Air Force, the Liberty Bell, the White House, etc) into an illustrated book (illustrations done by me) with some brief descriptions of each icon/element. Are there any restrictions to selling a book containing this type of content? So far, I've discovered that some of the military branches have copyrighted logos, but I am still looking for information on monuments and locations. I would also be curious to know if I can portray the Navy with an aircraft carrier, for example, instead of the copyrighted logo without infringing on copyright laws. Thanks!