Sensation Comics, Vol. 1

Steve Trevor investigates the disappearance of several test pilots in the same region. Wonder Woman follows Steve in her invisible plane and discovers a race of little people living in the nearby clouds. The little people capture Steve and force him into slavery. Wonder Woman is also captured. The cloud people explain that the jet engines of passing planes is causing a famine. To stop the planes, the cloud people have been capturing the planes and forcing the pilots to work for them. Wonder Woman rescues the prisoners and sends them back to Earth in her plane. She also sends the land of the cloud people higher into the atmosphere, so that planes will no longer threaten it.