In 1832, South Carolina passed an ordinance of nullification, a procedure by which a state could, in effect, repeal a federal law; it was directed against the most recent tariff acts. Soon, federal soldiers were dispensed to Charleston's forts, and five United States Coast Guard cutters were detached to Charleston Harbor "to take possession of any vessel arriving from a foreign port, and defend her against any attempt to dispossess the Customs Officers of her custody until all the requirements of law have been complied with." This federal action became known as the Charleston incident. The state's politicians worked on a compromise law in Washington to gradually reduce the tariffs.
After South Carolina passed an ordinance of nullification, who was sent to Charleston Harbor?
five United States Coast Guard cutters

Morales began work on his "indigenous autonomy" policy, which he launched in the eastern lowlands department on August 3, 2009, making Bolivia the first country in the history of South America to affirm the right of indigenous people to govern themselves. Speaking in Santa Cruz Department, the President called it "a historic day for the peasant and indigenous movement", saying that, though he might make errors, he would "never betray the fight started by our ancestors and the fight of the Bolivian people". A vote on further autonomy will take place in referendums which are expected to be held in December 2009. The issue has divided the country.
When did Morales launch his policy in the eastern lowlands?
2009

Purely electronic circuit elements soon replaced their mechanical and electromechanical equivalents, at the same time that digital calculation replaced analog. The engineer Tommy Flowers, working at the Post Office Research Station in London in the 1930s, began to explore the possible use of electronics for the telephone exchange. Experimental equipment that he built in 1934 went into operation 5 years later, converting a portion of the telephone exchange network into an electronic data processing system, using thousands of vacuum tubes. In the US, John Vincent Atanasoff and Clifford E. Berry of Iowa State University developed and tested the AtanasoffBerry Computer (ABC) in 1942, the first "automatic electronic digital computer". This design was also all-electronic and used about 300 vacuum tubes, with capacitors fixed in a mechanically rotating drum for memory.
How many vacuum tubes did the Atanasoff-Berry computer use?
about 300