Answer:
The Second Red Scare was responsible for the trials of Alger Hiss and the Rosenbergs.
Explanation:
The Second Red Scare (also meaning: the phobia or concern for the infiltration of Communism) was what led to the trials of Alger Hiss, and Julius Rosenberg and Ethel Rosenberg (who were both referred to as “the Rosenbergs”): due to the fear that Communism was infiltrating, and seeking for sensitive information in the United States, the federal government focused its attention on Alger Hiss who was found to be an undercover agent for Communist Soviet Union, and the Rosenbergs who were found to have been passing information about the atomic bomb to the Kremlin. Alger Hiss and the Rosenbergs were tried after evidence was found against their activities.
Answer:

Mayor and council system, municipal government in which a locally elected council is headed by a mayor, either popularly elected or elected by the council from among its members. In strict usage, the term is applied only to two types of local governmental structure in the United States.
Answer:
Its so that they cant make you wait in prison for years until a trial.
Explanation:
You have the right to a speedy trial, that means they cant make you wait for years and just keep you in prison or jail. They have to give you a trial and the 6th amendment makes it so it has to be quick (within a couple months or up to a year)