There's been some discussion about the Semi Truck's review mirror / camera fin pods that we saw at the reveal. As mentioned in another thread, it was dark and tricky to see, but it appeared like there were 4 cameras in each of these "fins". Presumably these provide rear-review images for the driver's screens as well as for Autopilot. @buttershrimp and I thought they were interesting and wanted you folks to be able to check them out. First pic shows where they live on each side of the Semi tractor. The 2nd two pics show the fin (actually it's the one on the right side of the truck) with us standing underneath it at slightly different angles. @lunitiks - here you go! I've circled the 4 unique lenses I could make out - note I didn't circle the ones that were visible in both pics.