In 2013, the practice of mass surveillance by world governments was called into question after Edward Snowden's 2013 global surveillance disclosure on the practices by the National Security Agency (NSA) of the United States. Reporting based on documents Snowden leaked to various media outlets triggered a debate about civil liberties and the right to privacy in the Digital Age. Mass surveillance is considered a global issue. The Aerospace Corporation of the United States describes a near-future event they call the "GEOINT Singularity" in which everything on the surface of the earth will be monitored at all times and analyzed by artificial intelligence systems.