This image was originally posted to Flickr by Nfrastructure at https://flickr.com/photos/46167543@N05/41833250291 (archive). It was reviewed on 2018-05-02 04:33:04 by FlickreviewR 2, who found it to be licensed under the terms of the cc-by-2.0, which is compatible with the Commons. It is, however, not the same license as given above, and it is unknown whether that license ever was valid.