I thought McMaster's explanation of what happened was reasonable as to how this happened. He said the President was not briefed on the information beforehand and he did not know the sources before he spoke and was not aware of what was classified and what was not. My take is that if he had been aware of the high security attached and the source and concerns attached to the source, and the risks of disclosure, maybe he would not have said what he did to the Russians or would have been more careful. McMasters also said the disclosure was "appropriate" which I take it means it fit the nature of the discussion Trump had with the Russians-- it was appropriate for the discussion. The question posed by the security persons who spoke to the Washington Post has not been answered. Was this a smart thing to do? Should Trump have been briefed first? Why was he not briefed first?