Question: Do the actors sitting at the table outside of MSec office along with Matt, Daisey, Blake and Jay, ever say anything? What's their purpose?
Question: How is it possible that the foreign ministers of Russia and China who live and work in Moscow and Beijing are always in Washington to meet with Secretary McCord?
Answer: Most likely, in real life, this would not happen. However, for the purposes of the show, the ministers are shown as being frequently in D.C. This would be classified as a "suspension of disbelief." It is a plot device where the audience knows something is untrue or realistic, but are willing to accept the premise in order for the story to be told.