Timelapse shows construction of ammonium nitrate storage dome The inflated Airform for the dome, showing the airlock system at the entrance. (Mike South) The inflated Airform from the back side. (Mike South) The Airform set on the foundation before being blown up. (Mike South) Detail of the top of the dome, where the steel reinforcing rebar can be seen. (Javier Figueroa) The interior of the dome, where the steel reinforcing rebar is added. (Javier Figueroa) The concrete foundation for the Monolithic Dome, the first step in the dome-building process. (Mike South) An aerial view of the construction site. (Mike South)