everything looks like a fokker d7. engines were bigger and faster, but no real development until combat. in 1939, all of a sudden there were model planes, of mention -- big machine guns, that is where real development came. the guise of world war i set the original up. there was a famous german, early days of working, and the real organization was tactics. there is a bunch of rules for ir combat. the modern guise of the u.s. navy and united states air force still pull out his rules. it is hard to imagine that world war i for the united states started over 100 years ago, and this day we are at now. things changed dramatically, some things have changed, some have it. come to the virginia beach and see airplanes through history. you can hear stories i did not have the chance to cover this time. nnouncer 1: you can watch this and other american artifacts programs by visiting our website at -span.org/history. >> so you can see too that women have a means of reinforcing either the best in their husbands or the worst. and tha