Hill observed several nuclear explosion tests conducted at the Nevada Test Site. On November 1, 1951, unable to get official clearance to attend the
Operation Buster-Jangle Dog nuclear test, Hill was on
Mount Charleston, a large mountain northwest of
Las Vegas, in order to view the explosion that would occur approximately 60 miles to the north of the mountain. After the explosion, Hill and the other assembled reporters realized the highly
radioactive mushroom cloud was moving south at a high speed, in their direction. Hill decided to descend the mountain and began driving down the twisting mountain road, but was unable to escape from the area before the cloud arrived. He wrote later about the experience. Realizing that the cloud was directly over him, "emphasizing its presence with a blast of static on my car radio", Hill stopped and stepped out of the car to observe the passing of the cloud. Later, in
Indian Springs, an acquaintance with a
Geiger counter measured more than 20
milliroentgens per hour on some parts of his car. == Death ==