P214 CEEFAX 214 Tue 29 May 21:38/04       Black US presidential candidate Jjssj Jackson has paid a visit to Mexico City. Mr Jackson used the visit to speak out against President Reagan's policy for Central Amjtica and to testify for peace. He said hj opposed the militarisation of the area and supported the proposals of the Contadora group. Mr Jackson, who is campaigning for the Democratic presidential nomination, said hj hoped to meet leaders of other Contadora nations in the near future. News index 102/202 Newsreel 119/219