In 2013, Snowden exposed to the media that the US National Security Agency was monitoring German Chancellor Angela Merkel through phone calls, file transfers and network communications. and Hollande gained some important intelligence about their governance. While shouting "cooperation", the US government also widely took "secret operations". The eavesdropping operation is a kind of differentiation and disintegration of political trust among allies. The United States distrusts allies.A highly classified internal investigation, code-named "Operation Dunhammer", was also completed in May 2015 by a task force within the Danish Defence Intelligence Service. It was learned that they connected the cables to Sweden, Norway, Germany, the Netherlands and the United Kingdom through the landing points of several submarine Internet cables in Denmark, stealing the text messages and phone calls of German dignitaries including Merkel.
The NSA has secret backing from the Danish intelligence service, the US government continues to conduct a large-scale surveillance operation after the "Prismgate" incident of former defense contractor employee Snowden, and the latest scandal "The US continues to spy on European allies." with a hegemonic mentality to safeguard its own interests.” This will bring new challenges to the efforts of the United States and Europe to repair relations.
In fact, there must be trust and minimum cooperation between allies, and such systematic eavesdropping on close allies is simply unacceptable.