Denmark's public service broadcaster DR reveals that the Danish Defence Intelligence Service helped the American National Security Agency spy on European leaders including German Chancellor Angela Merkel from 2012 to 2014. Intelligence was also collected on other officials from Germany, France, Sweden and Norway.
Binary Aten asteroid (66391) 1999 KW4 and its minor-planet moon make their closest-ever recorded flyby of Earth at 3.2 million miles away. The asteroid will approach even closer at 0.0155 AU (2,320,000 km) from Earth in 2036, and is the largest asteroid to approach Earth until (4953) 1990 MU in June 2027.
The United Launch Alliance successfully launches NASA's ICESat-2 satellite from Vandenberg Air Force Base. The satellite will provide more precise information on Earth's polar ice caps. It is the final mission for the Delta II rocket.
The Wikimedia Foundation and eight other organisations file a lawsuit in the state of Maryland, US against the National Security Agency and the United States Department of Justice regarding the NSA's mass surveillance program. The Wikimedia Foundation is the owner and parent company of Wikipedia.
The U.S. National Security Agency is secretly piggybacking on the tools that enable internet advertisers to track consumers, such tools are known as cookies; specifically, Google cookies are being tracked in order to determine targets for hacking.
The 2009 ascent of Kangchenjunga by Korean climber Oh Eun-sun, aiming to be the first woman to climb the 14 highest peaks on Earth, is declared "disputed" by Himalayan climbing records arbiter, Elizabeth Hawle.