Once operational, it served as a fighter group training installation from spring of 1943 through early summer 1944.

Once operational, no workers will regularly man the station.

Modern gadgets, once operational, like to communicate with their users and will frequently send messages that are incomprehensible.

Once operational, Cimarron will employ a single on-site maintenance technician and a couple of security guards.

The plant will eventually produce about 900,000 tons of pellets per year, making it the largest in the world once operational.

Once operational, in about 10 days, the missiles would need five minutes to reach Washington.

Once operational, the service may be free, supported by advertising, provided for a monthly charge per user or some combination.

Once operational, lifters could be climbing the space elevator nearly every day.

Once operational, the operation will need several hundred full-time employees.

The airport is yet to confirm which airline(s) will use the new terminal once operational.