OxySure Celebrates New United Nations Vendor Registration With Salute to All Peacekeepers on International Day of UN Peacekeepers FRISCO, Texas, May 29, 2012 (GLOBE NEWSWIRE) -- OxySure® Systems, Inc. (OTCBB:OXYS) ("OxySure"), the pioneering manufacturer of life-saving easy-to-use emergency oxygen solutions with its "oxygen...