The strategic location of Denmark has encouraged US interest in intelligence cooperation. As Mikko Hypponen, the head of the data security company F-secure, has pointed out to a Danish newspaper, "If your country is in a key location, and if a lot of interesting traffic happens to flow through it, that makes you an important partner. A large part of the internet traffic from Russia and the rest of Scandinavia flows through Danish networks, which justifies the US interest in working together with the authorities."

Danish media sources disclosed that the Danish Defence Intelligence Service participates in "all probability" in secret cooperation with the NSA to tap fibre cables carrying internet and telecommunications traffic through Denmark, including Facebook messages, Skype calls and emails.

In 2008, Danish channel DR1 TV released a documentary detailing the close cooperation between the CIA and Danish intelligence services, including on issues like renditions. Flight schedules showed that CIA-operated flights which stopped over on Danish territory were destined for countries like Egypt, Jordan, Romania, Uzbekistan, Azerbaijan, and Afghanistan.

Danish MP Pernille Skipper says in Denmark there is very little control over intelligence agencies.