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Radio-wave communications signals travel through the air in a straight line, reflect off of clouds or layers of the ionosphere, or are relayed by satellites in space. They are used in standard broadcast radio and television, shortwave radio, navigation and air-traffic control, cellular telephony, and even remote-controlled toys.
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The 18th Amendment prohibited the sale of, the transportation of, the manufacturing of any alcoholic beverage. It did have the effect of enforcing a decline in deaths related to alcohol, but it did not entirely fulfill its intent.
Crime increased. Criminal activity increased. Al Capone became one of the richest man in America from the proceeds of black market alcohol. His 100K in the 20s would make his net worth about 18 billion in today's dollars.
The 18th became law in 1919. It was repealed in 1933 just 4 years later. It is the only amendment that suffered this fate.
The theory is that they have feuds through out all the countries and cultures
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The distribution of goods led directly to the development of cities. Just like in Europe cities developed around centers of trade. The trade led to the urbanization and development of big towns that were connecting different trade routes. The trade routes involved North Africa, Sahara, and Europe and it lasted for centuries. More urbanization led to even the first university being built in Timbuktu in Mali.
Economic, cultural, and ideological differences were some of the problems unified Germany faced in 1990. Eastern Germany lost a lot of the money during currency conversion. Industrially the east was lacking and did not and could not produce as many products as the west could. Eastern Germany was damaged way more than Western Germany and was repaired at a slower rate than Western Germany. The railroads were not modernized as well as other technologies such as highways, and telephones. Due to the Berlin Wall politically and culturally the Eastern and Western Germans began to do believe and do things differently.
