This episode's headline: News Summary; Live Aid: Getting Through?; Space Rendezvous; Titanic Tales. The guests include In Washington: M. PETER McPHERSON, U.S. Agency for; International Development; Dr. RICHARD BERENDZEN, Astronomer; Reports from NewsHour Correspondents: MICHAEL BUERKE (BBC), in South Africa; TOM BEARDEN, in Pittsburgh; BILL HAMILTON (BBC), in Birmingham, England; GAVIN HEWITT (BBC), in Sudan; JUNE CROSS, in Woods Hole, Massachusetts. Byline: In New York: ROBERT MacNEIL, Executive Editor; In Washington: JUDY WOODRUFF, Correspondent