John Head organised the visit of Jody Williams from the International Campaign to Ban Landmines (ICBL) to New Zealand in late November 1993 and held a press luncheon and public lecture for her in Wellington and organised several meetings for her with media in Auckland.
In 1996, after years of well organised effort by CALM, New Zealand ceased the operational use of landmines and in 1997 signed the Ottawa Convention to which 152 nations are now signatories.