Hello all! I have to write a review paper of several current articles for my Gas Dynamics course. My research is in Welding and Automation, so I have very little experience in the area of aerodynamics. However, I have recently read a book on Lockheed Skunk Works and think that I would like to find a topic that deals with or has an application to the SR-71 Blackbird. I just wanted input on topic selection, since you all seem to be very knowledgeable. I want something that I can find at least four recent articles on and that is accessible to someone with an engineering background but only an introductory knowledge of aerodynamics. I was tentatively considering sonic boom propogation. Thanks for any thoughts!