S1, E2: Grab a front row seat to some of the world's most momentous events including the Japensese attack on Manchuria and the rise of Hitler and the Nazi Party. As the world was undergoing significant changes so was the miltary air power. From the B-9 in the 1930s to the firrst four-engine bomber, the B-17, air might was in a constant battle against itself in the early part of the 21st century.