In the late 1960s, the united states and the soviet union adopted a foreign policy of détente. however, many people doubted that the soviet union was interested in real change. the leader of the soviet union, leonid brezhnev, continued to a. treat the space program as a potential weapon during the period of détente. b. refuse to meet with the foreign leaders during the period of détente. c. build up his country's military power during the period of détente. d. refuse to sign anti-nuclear agreements during the period of détente.