Some true secret treaties still exist, however, mostly in the context of agreements to establish foreign military bases. For example, after the 1960 Security Treaty between the U.S. and Japan, the two nations entered into three agreements that (according to an expert panel convened by the Japanese Foreign Ministry) could be defined as secret treaties, at least in a broad sense. These agreements involved the transit and storage of nuclear weapons by U.S. forces in Japan despite Japan's formal non-nuclear weapons policy. Prior to their public release in 2010, the Japanese government had gone so far as convicting journalist Nishiyama Takichi, who tried to expose one treaty, for espionage. Operation Condor was a secret treaty between the US and five South American nations to coordinate counter-insurgency and "dirty war" against communist rebels and other leftists in Latin America.