Topics include: Nicaragua says Americans abroad shot-down plane - U.S. reaction; Pope celebrates Mass at Annecy; Russian official says Moscow expects Iceland "Impulse;" Shultz sets out U.S. aims at Iceland meeting; Orlov makes plea for greater East-West human contacts; U.S. delegation chief praises Stockholm conference results; Shultz disowns U.S. connection with downed aircraft; Reagan, Shultz comment on human rights and Reykjavik; Pope speaks warmly of his visit to France; Soviet official in Reykjavik says Moscow wants concrete talks; Nicaragua and U.S. still at odds over downed plane; "We are making history," says Reagan as leaves for Iceland; Orlov meets members of U.S. Helsinki commission; Kohl again condemns border shooting; Peres resigns in Israeli political deal; Gorbachev arrives - excerpts from airport statement; Soviet official rejects Reagan test ban treaty statement; White House press spokesman gives Reykjavik briefing; Kohl reacts bitterly to Bonn official's murder; Soviet official and speakes at odds over news blackout.