During this period, Battelle conducted most of the basic research into electrophotography, while Haloid concentrated on trying to make a commercial product out of the results. In 1948, Haloid's CEO, Joseph Wilson, convinced the U.S. Army Signal Corps to invest $100,000 in the technology, an amount that would double later. The Signal Corps was concerned about nuclear war. The traditional photographic techniques they used for reconnaissance would not function properly when exposed to the radiation from a nuclear attack; the film would fog, much as consumer photographic film can be fogged by an airport X-ray machine. The Signal Corps thought that electrophotography might be developed into a product that would be immune to such radiation. Through the 1950s, over half the money Battelle spent developing electrophotography came from government contracts.