When Bill Bruce went up into the clouds and disappeared from the view of the other pilots in his Flight, for a moment the men in the planes following were stupefied. It took some time for them to realize why this seemingly unnecessary dangerous maneuver had been performed. Then they came to a point where they saw the mouth of the tunnel and they could visualize what was ahead. They had no time to question the motives or judgment of their leader, for the tunnel was in their immediate front and other planes were thundering in their rear. They had no choice but to follow Bill Bruce. If they tried to turn, they would run the chance of colliding with the following planes. So each pilot in turn zoomed his plane into the clouds.