and he said to young wolfgang, my name is leo ferguson, call me leo.eo ferguson married his mother. they moved to colorado, and wolfgang samuel retired a few years ago as a colonel in the united states air force. >> yeah. talking about the dangers these men went through flying into and out of berlin. i mean, the three corridors into berlin, one in the north, one in the south and then the central one, the ranges of return. but one of the things about i wonder if you could describe the conditions of landing at the airport in the center of berlin. >> well, the airport for any of you who have seen it, one of the most extraordinary places in the world. in the first place, on one side of it is a building. it's done in nazi gothic. it's a building, it was the large building in the world, three-quarters of a mile long looped around with accept levels. there were hospitals -- seven levels. there were hospitals, plane factories down into the ground. it had more floor space than any build anything the world until the pentagon was finished. on the other side of th