I think the other three, or the other two primarily, are really a clear understanding of where transponders will play a role, but more importantly, I think, the government could take an active role on funding and supporting the stuff that's been stated already around education, and education as to how UAVs can be integrated into uncontrolled airspace and the risks associated with the controlled airspace. It's education and training.
On December 6th, 2016. See this statement in context.