THE FIELD DOOR ============== There is no wormhole. No light show. The doorway is an ordinary service door with chipped gray paint and a push bar. You step through. The door closes behind you. When you turn around, there is only a concrete wall. The key is still in your hand. Its FIELD marking has gone dark. Ahead, a sign hangs crookedly: NODE 19 NORTH SECTOR FIELD STATION The air smells like wet pine, dust and old electrical insulation.