When you hear seaplane you might think of a Piper Cub on floats. On the other end of the spectrum is the massive Martin Mars, a 90,000 lb. flying boat with a wingspan of 200 feet. Incredibly, this World War II vintage airplane is still flying, and in this video you'll get to ride along as a dedicated team of pilots and mechanics flies the airplane into EAA Oshkosh.  It's a unique way to arrive at the world's largest fly-in.