It was constructed using objects that he could find around him. For example, he had only a single wheel mounted on a bicycle fork and it all stood on a simple white chair. He said the idea behind it was that he always wanted to mount it on a chair and just watch it turn around and around infinitely. 
        
             
        
        
        
Well, when the Depression started in 1929, President Hoover had began his time in office. He was a Republican and followed a strict Laissez Faire (gov't hands-off economy) attitude, thinking that America would recover from this brief economic decline. Until 1933, very little was done to help the United States recover from the Depression. 
When Franklin D. Roosevelt took office in 1933, he enacted a completely different plan than Hoover. FDR started his New Deal plan, in which several programs and projects would start to get Americans back on their feet. Over the four years of his presidency, the unemployment rate plummeted from 25% to around 14%. FDR was elected for a second term, but in 1938, the unemployment rate rose slightly to around 18% as New Deal plans came to a halt. However, the plans came back into play and the unemployment rate continued to fall as more Americans got back out and working.
As World War II rolled around in 1939, and when American joined the conflict in 1941, business (especially manufacturing) exploded! WWII truly ended the Great Depression, as industries needed an incredible workforce to keep up with the war effort. 
 
        
             
        
        
        
Do you mean Epidemic?of it is then it is a rapid disease to a large number of people in a given population within a short period of time,usually two weeks or lesa.
        
             
        
        
        
The Contras were numerous right-wing rebel organizations supported and sponsored by the United States that operated in Nicaragua from 1979 to 1990 in opposition to the Marxist Sandinista Junta of National Reconstruction Government that came to power in 1979 following the Nicaraguan Revolution.
<h3>What is a proxy war?</h3>
A proxy war is one in which a great power initiates a conflict but does not become engaged.
<h3>What was the Chile proxy war?</h3>
After a long period of social instability and political turmoil between the opposition-controlled Congress and the socialist President, as well as an economic war ordered by US President Richard Nixon, a group of military officers led by General Augusto Pinochet seized control in a coup on September 11, 1973, effectively ending.
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Islamic civilization experienced a golden age under the Abbassid Dynasty, which ruled from the mid 8th century until the mid 13th century. Under the Abbassids, Islamic culture became a blending of Arab, Persian, Egyptian, and European traditions. The result was an era of stunning intellectual and cultural achievements