"Even with good microphones and amplifiers the engineer in the field may often experience difficulties with the lines connecting the outside point to the studio. The majority of such lines do not transmit the higher frequencies adequately, especially the longer ones. The problems become immense when European simultaneous broadcasts are attempted. Experiments on the continental wireless link have done no more than reveal its unreliability. The undersea telephone line, however, does not give either good or even intelligible quality of speech if it is longer than a couple of hundred miles, and it is quite unusable for the transmission of a musical programme. "The B.B.C. has been the first in the world to exploit Simultaneous Broadcasting to its fullest advantage for a national system, and thanks to the co-operation of the Post Office engineers, it is possible to pick up a programme wherever it may take place within the British Isles and radiate it simultaneously from all distribution centres. "Looking ahead still further and assuming that the wireless will supplement the wire line link, there is no reason why a simultaneous broadcast of something of fundamental importance to the whole civilised world should not take place some time in the future." In a book entitled "Radio Goes to War" published by Faber & Faber in 1943, Charles J. Rolo wrote, "Radio went to war on five continents shortly after the Nazi Party came to power in Germany. In nine years it has been streamlined from a crude propaganda bludgeon into the most powerful single instrument of political warfare the world has ever known. Spreading with the speed of light, it carries the human voice seven times round the globe in one second. When Hitler makes a speech in the Kroll Opera House in Berlin, listeners in America and the whole world hear his words by short wave even before his own immediate audience hears them. Radio speaks in all tongues to all classes. All pervasive, it penetrates beyond national frontiers, spans the walls of censorship that bar the way to the written word, and seeps through the fine net of the Gestapo. It reaches the illiterate and the informed, the young and the old, the civilian and the soldier in the front line, the policy makers and the inarticulate masses. So great is the importance of radio to-day that the seizure of a defeated nation's transmitters has become one of the primary spoils of war." In Greece, broadcasting was started in the northern city of Thessaloniki (Salonica) by the pioneer of Balkan broadcasting Christos Tsingeridis, in 1928. A museum in that city tells the full story of the first broadcasting station in the whole of the Balkans.