1. what was a great technological feat of the shuttle program?

docking with the international space station

repairing a shuttle in orbit

putting the hubble space telescope was put into orbit and later repairing it

2. the united states has a free trade agreement with:

cuba and haiti

malaysia and borneo

mexico and canada

3. the united states gave much attention to environmental issues in the 1980s and 1990s. preservation efforts have included:

care of endangered species

maintenance of lands and parks

purification of the air

all of the above

4. president george h. w. bush and mikhail gorbachev:

disagreed about the policy of perestroika

agreed to destroy most of their countries' chemical, nuclear, and conventional weapons

agreed to destroy the berlin wall

reunited east and west germany

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.

the triple alliance. germany and austria-hungary were already allies by 1879 when, worried about a threat from russia, they formed the dual alliance. italy joined the group in 1882. there was a concern about a possible attack from france and the alliance needed powerful friends to defend it.