On diversity, just a minor thing I observed: Me (African country) and a colleague of mine (some Asian country) got our visas - for a short stay Schengen visa - denied despite being co-organizers and volunteers for one of the dev rooms. The commentary here is that it's difficult (and expensive) for minorities (non-US and non-European peoples) to get into Brussels, moreso with the refugee crisis. It sucks. I'm not entitled to getting a visa, but it would be nice if, like some folks, I could plan myself and just show up. But it is what it is.