 Complete the following phrase:  From 1951 to 2006, there was an American military base and troop presence in Iceland. During the Cold War, Iceland had a close but contentious relationship with the United States, leading some scholars to describe Iceland as a rebellious ally and reluctant ally. Iceland repeatedly threatened to leave NATO or cancel the US defence agreement during the Cold War. As a consequence, the United States provided Iceland with extensive economic assistance and diplomatic support. Iceland hosted the historic 1986 