 Complete the following phrase:  By 1984, Sweden had signed and ratified the Antarctic Treaty. The Treaty was established in 1961 to ban all military activity in Antarctica. The Antarctic Treaty was not, however, the first nonarmament treaty that Sweden signed. Previously it had participated in the establishment of the Outer Space Treaty in 1967, which restricts the placement of nuclear weapons or other types of weapons of mass destruction in space. The 1986 