The term "special relationship" has been used to describe the U.S.-U.K. partnership since WWII in the face of Nazi, Germany, but many have argued it was solidified during the Cold War under the close alliance of President Ronald Reagan and Prime Minister Margret Thatcher. This week former and current diplomats, government officials and foreign policy advisers convened in London to celebrate what would have been Thatcher’s centennial birthday, and to reflect on her partnership and friendship with the late U.S. president. The Reagan-Thatcher alliance set a precedent that has transcended political parties and national leaders, even during periods when the...