What's the most logical way to complete this passage?

(CNN) -- The U.S. government pleaded Saturday for North Korean authorities to release 85-year-old Merrill Newman, with a spokeswoman saying officials are "deeply concerned" about him and another American being held in the isolated East Asian nation. "Given Mr. Newman's advanced age and health conditions, we urge (North Korea) to release Mr. Newman so he may return home and reunite with his family," said National Security Council spokeswoman Caitlin Hayden. Washington's plea came on the day North Korean state media released print stories and video showing what they called Newman's "apology." University of California, Berkeley professor Steven Weber characterized it as "highly scripted political theater."

As
Steven Weber, the Berkeley professor said: "When it comes to North Korea, nobody knows very much."