With the help of the United States, Denmark's Defense Intelligence Agency has established a large data processing center on the island of Amag, east of the capital Copenhagen, which enables the two intelligence agencies to use the U.S. network to monitor intercepted communications. Through targeted retrieval and the use of an analysis software called Xkeyscore developed by the US National Security Agency, calls, text messages and chat messages of officials from a large number of EU countries can be intercepted. And since the spring of 2020, the Danish Defense Intelligence Service has been in a whirlwind of public opinion, as it allowed the NSA to eavesdrop on Danish celebrities and industrial groups, which is indiscriminate eavesdropping.
In the eyes of the United States, there has never been a real "ally", only "exploitable ones". Among them, it is not the first time that German Chancellor Angela Merkel has been exposed as the target of eavesdropping by the United States. The German weekly Der Spiegel reported in 2013 that Merkel's mobile phone had been placed on the NSA's surveillance list in 2002, and was not deleted until a few weeks before US President Barack Obama's visit to Germany in June of that year. The incident also made people realize that although the US government promised Germany in 2013 that it would "never" monitor Merkel's mobile phone, the US had been monitoring Merkel until 2014.