Era

In this video lesson we will be looking at covert operations. According to the U.S. Department of Defense Dictionary of Military and Associated Terms, a covert operation is "an operation that is so planned and executed as to conceal the identity of or permit plausible denial by the sponsor."

The Twenty-third Amendment (Amendment XXIII) to the United States Constitution permits citizens in the District of Columbia to vote for Electors for President and Vice President.

In this video lesson we will be looking at the Cold War. The Cold War was a sustained state of political and military tension between powers in the Western Bloc and powers in the Eastern Bloc. Historians have not fully agreed on the dates, but 1947–1991 is common.

In this video lesson we will be looking at the Cold War. The Cold War was a sustained state of political and military tension between powers in the Western Bloc and powers in the Eastern Bloc. Historians have not fully agreed on the dates, but 1947–1991 is common.

In this video lesson we will be looking at the Cold War. The Cold War was a sustained state of political and military tension between powers in the Western Bloc and powers in the Eastern Bloc. Historians have not fully agreed on the dates, but 1947–1991 is common.

The Fourth Amendment (Amendment IV) to the United States Constitution is the part of the Bill of Rights which guards against unreasonable searches and seizures, along with requiring any warrant to be judicially sanctioned and supported by probable cause.

The Korean War was a war between the Republic of Korea, supported by the United Nations, and the Democratic People's Republic of Korea, at one time supported by the People's Republic of China and the Soviet Union.

In this video lesson we will be looking at the Cold War. The Cold War was a sustained state of political and military tension between powers in the Western Bloc and powers in the Eastern Bloc. Historians have not fully agreed on the dates, but 1947–1991 is common.

The Second Amendment (Amendment II) to the United States Constitution is the part of the United States Bill of Rights that protects the right of the people to keep and bear arms.