I'm cleaning out my inbox right now and keep finding cool little stuff in the industry newsletters. So I'll probably keep spamming Oppo throughout the day. Here is a pretty cool article on the rail gun being tested by the Navy. It uses electromagnetic forces to launch 23 pound kinetic kill projectiles to 5,000 mph (8,000 kph, 2200 m/s, 7,300 fps, Mach 6.5). The footage is pretty neat and you can see the shock waves coming off the projectile. I wonder how they manage to track it?