CMS storage federations

The progress on providing access to CMS experiment data through the use of WAN transfer protocols directly from remote storage to a running application are presented. This program of work has involved the deployment of infrastructure on facilities in both the US and in Europe, the optimization of the application to make more efficient use of a higher latency connection, and the demonstration of a variety of use cases to showcase the value of this functionality. The project is at the level where several of the intended applications are used in production running, and several of the more ambitious techniques are in the prototype phase.