The first Los Angeles-class nuclear attack submarine (SSN) entered service in 1976; 33 units of this type are in Command. This class follows the experimentation done with the Glenard P. Lipscomb (SSN-685), built between 1971 and 1974, and is much larger than previous SSNs. Submerged speed is signifi
Mass attendance at a public show considerably multiplies the potential possibility that the degree of tragedy it produces will be greater in the event of an accident or any other type of negative incidence. That is why nightclubs, concerts and football stadiums are usually the places where the most
Scapa Flow is a bay located in the Scottish Orkney Islands, just over 20 km long by about 15 km wide. Its geographical position, its sheltered waters and an almost constant depth of 40 meters have made it a true natural port. Which has been used since the Vikings in the Middle Ages, until the 20th c
The so-called Vargas Era comprises one of the longest governments in the history of Brazil and a watershed in the history of the Brazilian Republic. By Me. Cláudio FernandesGetúlio Vargas (1882-1954) he held the presidency of the country, at first, for fifteen years:from 1930 to 1945. Then he retur