More details continue to emerge on the scale of government surveillance in the United States. The Wall Street Journal reports the National Security Agency’s spying network ensnares around 75 percent of all U.S. Internet traffic — more than officials have publicly disclosed. The NSA has the capacity to retain the content of emails between U.S. citizens and filter domestic phone calls made over the Internet. The filtering occurs at more than a dozen sites established near major Internet transit points across the country. The NSA gathers and filters content through close collaboration with the nation’s major telecom firms. In many cases, the telecoms’ lawyers act as the sole checks on whether data reaches the NSA. In one example of government-telecom collaboration, the NSA and FBI worked with Qwest Communications to monitor communications around the 2002 Winter Olympics in Salt Lake City, Utah. All email and text communications in the Salt Lake City area were monitored for a period of around six months.