By October 19, frequent U-2 spy flights showed four operational sites.

One runway was kept operational until the 1990s for transport to/from the site.

Will it be possible to get enough testing sites operational in time for a trial?

By the mid-1960s, the Soviet Union had ended the deployment of the S-75 with perhaps 1,000 operational sites.

According to its developer, Green Pine's deployment at a new operational site takes "less than 24 hours".

The station itself closed as an operational site that year.

Their small size also means that the rats can be easily transported to and from operational sites.

With all sites now completed and operational, the company employs over 500 people.

These structures provide a convenient operational site for electronic equipment at a central distribution area or network node.

The hardware not needed for the operational sites will be used for testing and training.