I particularly liked this lecture because it has to do with what I am learning in my mechanics of solids class. We learned about the stress vs strain curves and permanent deformation. Both the stress simulation, and the composition of the planes were an interesting thing to see. Especially the shift of from mainly aluminum to composites shows that we are able to understand which materials are better for certain areas to minimize stress and strain. With the crash of American Airlines flight 587, it showed that while composites are supposed to be better than what was there originally, they still do have problems. Based off the website provided on the slide, this specific one, was most likely due to the temperature drops/rises causing condensation to build up inside the material. This was also evident in the rivets holding the material looked rusted. Besides the disaster, this lecture was something that I was able to relate with since I just learned it in a different class.