 On 1 August 2006 the banknotes of the second dollar (ZWN), with less elaborate designs, replaced those of the first dollar at the ratio of 1 000 to 1.The redenomination (codenamed Operation Sunrise) was heavily publicised under the banner "Zero to Hero", but was also rapid and disorganised which resulted in many people being unable to convert their old Bearer cheques to new issues before the lapse date, The Reserve Bank Governor Dr. Gideon Gono said that "10 trillion (first dollars) were still out there and it had become manure".Further denominations ranging from $5 000 to $500 million were issued in the period between August 2006 and May 2008 as cent cheques quickly became outmoded.