Context and question: Albert Einstein proposed that the laws of physics should be based on the principle of relativity. This principle holds that the rules of physics must be the same for all observers, regardless of the frame of reference that is used, and that light propagates at the same speed in all reference frames. This theory was motivated by Maxwell's equations, which show that electromagnetic waves propagate in a vacuum at the speed of light. However, Maxwell's equations give no indication of what this speed is relative to. Prior to Einstein, it was thought that this speed was relative to a fixed medium, called the luminiferous ether. In contrast, the theory of special relativity postulates that light propagates at the speed of light in all inertial frames, and examines the implications of this postulate.
In all reference frames, how is the the speed of light?
Answer: the same
Context and question: In 2013 and 2014, a Russian/Ukrainian hacking ring known as "Rescator" broke into Target Corporation computers in 2013, stealing roughly 40 million credit cards, and then Home Depot computers in 2014, stealing between 53 and 56 million credit card numbers. Warnings were delivered at both corporations, but ignored; physical security breaches using self checkout machines are believed to have played a large role. "The malware utilized is absolutely unsophisticated and uninteresting," says Jim Walter, director of threat intelligence operations at security technology company McAfee – meaning that the heists could have easily been stopped by existing antivirus software had administrators responded to the warnings. The size of the thefts has resulted in major attention from state and Federal United States authorities and the investigation is ongoing.
When was Rescator formed?
Answer: unanswerable
Context and question: The Central Intelligence Agency (CIA) is a quasi-independent agency of the United States Government. It appears to have multiple leadership. On the one hand its director is appointed by the president. It plays a significant role in providing the president with intelligence. On the other hand, Congress oversees its operations through a committee. The CIA was first formed under the National Security Act of 1947 from the army's Office of Strategic Services (OSS), which furnished both military intelligence and clandestine military operations to the army during the crisis of World War II. Many revisions and redefinitions have taken place since then. Although the name of the CIA reflects the original advised intent of Presidents Franklin D. Roosevelt and Harry S. Truman, the government's needs for strategic services have frustrated that intent from the beginning. The press received by the agency in countless articles, novels and other media have tended to create various popular myths; for example, that this agency replaced any intelligence effort other than that of the OSS, or that it contains the central intelligence capability of the United States. Strategic services are officially provided by some 17 agencies called the Intelligence Community. Army intelligence did not come to an end; in fact, all the branches of the Armed Forces retained their intelligence services. This community is currently under the leadership (in addition to all its other leadership) of the Office of the Director of National Intelligence.
What is a quasi-independent agency of the United States Government?
Answer:
The Central Intelligence Agency (CIA)