SH reports on S4 Session. Describes S4 effort to enlist contributors to various complementary S4 topics. One of the papers would be highlight the complementarity with Space.
The overall thought is that there will be a number of white papers solicited by the panel and contributed by the community.
Question: what public white papers would the probe produce? Should we point out synergies with other areas in astrophysics?
SH points out that the Probe effort ends in 12/2018, well before there is a panel, and well before there is a specific request for white papers. There won't be a 'Probe Effort' by the time white papers are requested by the panel. Perhaps prepare white papers in advance?
Some people envision revised science papers. LK mentions the Snowmass (on the mississippi) papers.
Jamie suggests a community cross-cutting 'CMB technology' white paper. It would include elements for development for both space and ground.