The Cold War saw periods of both heightened tension and relative calm. International crises arose, such as the Berlin Blockade (19481949), the Korean War (19501953), the Berlin Crisis of 1961, the Vietnam War (19591975), the Cuban Missile Crisis (1962), the Soviet war in Afghanistan (19791989) and NATO exercises in November 1983. There were also periods of reduced tension as both sides sought detente. Direct military attacks on adversaries were deterred by the potential for mutual assured destruction using deliverable nuclear weapons. In the Cold War era, the Generation of Love and the rise of computers changed society in very different, complex ways, including higher social and local mobility.
If it is possible to answer this question, answer it for me (else, reply "unanswerable"): Through what time period did the Berlin Blockade last?
Ah, so.. 19481949

Federal law and treaties, so long as they are in accordance with the Constitution, preempt conflicting state and territorial laws in the 50 U.S. states and in the territories. However, the scope of federal preemption is limited because the scope of federal power is not universal. In the dual-sovereign system of American federalism (actually tripartite because of the presence of Indian reservations), states are the plenary sovereigns, each with their own constitution, while the federal sovereign possesses only the limited supreme authority enumerated in the Constitution. Indeed, states may grant their citizens broader rights than the federal Constitution as long as they do not infringe on any federal constitutional rights. Thus, most U.S. law (especially the actual "living law" of contract, tort, property, criminal, and family law experienced by the majority of citizens on a day-to-day basis) consists primarily of state law, which can and does vary greatly from one state to the next.
If it is possible to answer this question, answer it for me (else, reply "unanswerable"): What type of government system do Indian reservations have?
Ah, so.. unanswerable

The U.S. census race definitions says a "black" is a person having origins in any of the black (sub-Saharan) racial groups of Africa. It includes people who indicate their race as "Black, African Am., or Negro" or who provide written entries such as African American, Afro-American, Kenyan, Nigerian, or Haitian. The Census Bureau notes that these classifications are socio-political constructs and should not be interpreted as scientific or anthropological. Most African Americans also have European ancestry in varying amounts; a lesser proportion have some Native American ancestry. For instance, genetic studies of African Americans show an ancestry that is on average 1718% European.
If it is possible to answer this question, answer it for me (else, reply "unanswerable"): How does the U.S. census define "black" Americans?
Ah, so..
having origins in any of the black (sub-Saharan) racial groups of Africa