Originally Posted by WarChild

No, this is completely wrong. The act of opening the door its self is "breaking". It's called a legal fiction and it's kind of goofy but in _most_ States that's the law.

If you take a key from under a mat, use it to open a door without permission, you are breaking and entering.

Some states do have "Unlawful Entry" as well. Usually this is walking in through an open door, or for instance a Landlord with a lawful key entering your property unlawfully. Although in some cases the last example will also be breaking and entering.