Airlock — Once the air is turned on, workers will attach the air lock.  The air lock serves as the entry point to the dome during the construction process.  The airlock has two doors, so that while entering the dome, pressure will not be lost.

Airlock — Once the air is turned on, workers will attach the air lock. The air lock serves as the entry point to the dome during the construction process. The airlock has two doors, so that while entering the dome, pressure will not be lost.