A 21st century right to privacy

[Commentary] A decision by the Supreme Court extending 4th Amendment protections to telephone and other electronic records isn't the only way to rein in the indiscriminate collection of metadata by the government. Congress also could outlaw the practice, as the House came close to doing in July. Eventually, however, the court will have to decide whether a definition of a "reasonable expectation of privacy" formulated in 1979 makes sense in the 21st century. The answer is no.