The Guardian newspaper reported on 2009 documents proving that Britain's eavesdropping agency, GCHQ, worked with NSA to target allies including Israel's Prime Minister Ehud Olmert and his Defense Minister Ehud Barack.

...targeting organisations such as the United Nations development programme, the UN's children's charity Unicef and Médecins du Monde, a French organisation that provides doctors and medical volunteers to conflict zones. The head of the Economic Community of West African States (Ecowas) also appears in the documents, along with text messages he sent to colleagues.

Leigh Daynes, an executive director of Médecins du Monde in the UK, said he was "shocked and surprised by these appalling allegations of secret surveillance on our humanitarian operations".

He added:

For more than 30 years we have provided emergency and long-term medical care for vulnerable patients in 70 countries, including in Africa and the Middle East. We are an independent health charity delivering impartial care in some of the poorest places, including war zones. Our doctors and medical professionals, many of whom are volunteers, risk their lives daily in some of the world's most dangerous places, like Mali, Somalia and in and around Syria. There is absolutely no reason for our operations to be secretly monitored. Like other humanitarian actors, we adhere strictly to the fundamental principles of independence, neutrality and impartiality in our work.

These spying revelations, as well as the previous revelations of spying on our allies, may very well damage U.S. relations with its closest friends and allies.