we examine the kingdom's challenges with: simon henderson, director of the gulf and energy policy programthe washington institute and sarah ladislaw is senior fellow at the center for strategic and international studies where she is director of its energy and national security program. sarah, let me start with you. oil prices have gone up in the last few days, maybe because of the fires in canada. but how big of an impact is the change in specifically oil or energy leadership in saudi arabia? >> well, it's pretty significant, especially if you take the long view of leadership on energy policy within saudi arabia. i think both of the sponsz that they had-- the response that they had to the sort of overcapacity of oil supply in the oil market in 2014 which lead to the period where we are now where you have lower oil prices was really the turning point for the way people viewed the role that saudi arabia was going to play in the markets. i think what happened over the weekend was a much anticipated leadership shift that falls in line with that broader message of, you know, we're going to pla