P110 ORACLE 110 San24 Jun ITV 0047:52   MANDELA SEEKS TO  ASSURE USA INVESTORS Nelson Mandela, who is visiting the US, has said in Boston that the business community should not fear instability in a post-apartheid South Africa. He said hj kntw the business community njedjd confidence about the security of their investments and hj appealed for economic help after apartheid had gone. Earlier two blasts ripped through the offices of South Africa's ruling National Party in Johannesburg causlng extensive damage. Right-wing extremists have vowed to use violence to disrupt President FW dj Klerk's plans to scrap apartheid. News headlines 101 Sport 130 Next Story Newsfile Sport TV Guide