the service received the authority to protect the head of state only after three us presidents lincolin garfieldinley were killed, starting with theodore roosevelt, secret service agents began to guard the head of the white house around the clock. now in the state service. about 5,000 people in its functions include the protection of the first persons of government buildings and foreign diplomatic missions, usa june 23 1961 the antarctic treaty came into force more than 10 years have passed since the ussr first came up with the corresponding memorandum, not wanting this part of the world to become a field for international disputes , the treaty became the first arms control agreement concluded after the second world war was it was decided that antarctica would not be divided among any countries, that the continents and adjacent waters would become a zone completely free of nuclear weapons. she will be used freely regime in the interests of science and humanity , the treaty was initially signed by 12 countries. now its participants are already 56 states of the world on june 23, 1987. the premiere