What was the big issue in the dred scott case?

The big issue was the legal rights of slavery and of states in regard to slavery.

In the blanks shown in the comment box by someone, I'd put in the word: S L A V E R Y

Details:

Dred Scott was a slave who had been owned by a Missouri man named John Emerson.  Emerson's service in the US military caused him to live for a time in Illinois (which was a free state) and Wisconsin (which was a free territory.  Later, back in Missouri, after John Emerson died, Scott tried to purchase his freedom from Emerson's widow, who refused.  With lawyers' help, he then filed suit to gain his freedom on the grounds that he had lived in a free state and free territory.

The Supreme Court, by a 7 to 2 margin, issued its ruling that Scott was not  entitled to his freedom just because he had lived at some times in free territory.  The Court also ruled that African Americans were not and could never be citizens of the United States, and therefore did not have the legal standing to file such a lawsuit.  The Court further stated that the Missouri Compromise of 1820 had been an overreach of federal government power -- that any states or territories were free to make their own decisions regarding slavery.

The Dred Scott decision was a controversial event which played into the tensions that by 1861 erupted into the Civil War in the United States.

they died with poison from the god patrick

the berlin blockade was an international crisis that arose from an attempt by the soviet union, in 1948–49, to force the western allied powers (the united states, the united kingdom, and france) to abandon their post-world war ii jurisdictions in west berlin. in march 1948 the allied powers decided to unite their different occupation zones of germany into a single economic unit. in protest, the soviet representative withdrew from the allied control council. coincident with the introduction of a new deutsche mark in west berlin (as throughout west germany), which the soviets regarded as a violation of agreements with the allies, the soviet occupation forces in eastern germany began a blockade of all rail, road, and water communications between berlin and the west. on june 24 the soviets announced that the four-power administration of berlin had ceased and that the allies no longer had any rights there.