June 15 (Reuters) - Zion Oil and Gas Inc :
   * ZION OIL AND GAS INC - ON JUNE 11, BOARD APPOINTED ROBERT DUNN AS CEO
   * ZION OIL AND GAS INC - DUNN WILL ALSO CONTINUE IN HIS ROLE AS CHIEF OPERATING OFFICER
   * ZION OIL AND GAS INC - EFFECTIVE JUNE 11, JOHN BROWN HAS RESIGNED FROM HIS POSITION AS CEO, WILL REMAIN AS EXECUTIVE CHAIRMAN OF BOARD

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