America believed to have worked with Britain on development of lasers . Michael Heseltine wrote a 'top secret ' letter to Margaret Thatcher in 1983 . It told of fears about the Soviets developing lasers and America 's progress . Letter revealed America had its own 'naval laser weapon ' to dazzle pilots . Margaret Thatcher ordered tests during Falklands War but it was not used .
Britain believed to have worked with America on development of lasers . Michael Heseltine wrote a 'top secret ' letter to Margaret Thatcher in 1983 . It told of fears about the Soviets developing lasers and Britain 's progress . Letter revealed Britain had its own 'naval laser weapon ' to dazzle pilots . Margaret Thatcher ordered tests during Falklands War but it was not used .