Yah this is a total clusterfuck... notice the picture where people are lighting the papers with their phones(!). Secret service, by the way, provide a mobile isolated unit to discuss these things.
As an aside: Why are nobody bothered that Trump basically uses the Japanese prime minister as a kind of prop in his own club where he is selling access to himself? (the fee for Mar Lago just doubled from 100K to 200K a year).
On the issue of national security, the Flynn-thing is still rolling. Flynn contacted the Russian embassy several times after Trump was elected and initially claimed (as did Pence) that he did not discuss sanctions. Many IC sources (they bug the embassy as per standard SIGINT procedure) are now saying that Flynn did discuss sanctions and Flynn is retracting to the usual "I can't remember" response. Reading a bit between the lines of what has been said Flynn likely encrypted some of the communication -- why?
I would strongly recommend this background article:
http://observer.com/2017/02/donald-trump-administration-mike-flynn-russian-embassy/
I wonder where the "Hillarys email server" crowd is on this one...