LONDON, ENGLAND - MAY 29:  Queen Elizabeth II welcomes His Excellency Mr Thembinkosi Obed Mlaba from the Republic of South Africa during an audience where he presented the Letters of Recall of his predecessor and his own Letters of Credence as Ambassador at Buckingham Palace on May 29, 2014 in London, England.  (Photo by Yui Mok - WPA Pool/Getty Images)