In 2013, Edward Snowden revealed that the National Security Agency was legally collecting millions of Americans’ phone calls and electronic communications—including emails, Facebook messages, and browsing histories—without a warrant. Congress has now decided not only to reauthorize these programs, but also to expand some of their most invasive techniques.

Get in-depth coverage of current and future trends in technology, and how they are shaping business, entertainment, communications, science, politics, and society.