In assigning television stations to various cities after World War II, the FCC found that it placed many stations too close to each other, resulting in interference. At the same time, it became clear that the designated VHF channels, 2 through 13, were inadequate for nationwide television service. As a result, the FCC stopped giving out construction permits for new licenses in October 1948, under the direction of Chairman Rosel H. Hyde. Most expected this "Freeze" to last six months, but as the allocation of channels to the emerging UHF technology and the eagerly awaited possibilities of color television were debated, the FCC's re-allocation map of stations did not come until April 1952, with July 1, 1952, as the official beginning of licensing new stations.