That was good news for dairy farmers, who were enjoying their best returns in a decade as the demand/supply balance tipped their way. Prices rose as consumption of dairy products rose by 1 per cent a year, but production from their cows fell by the same amount.
New Zealand stood to benefit as well. The Dairy Board, now Fonterra, has a three-year-old joint venture with Dairy Farmers of America, supplying hard, grating cheese.
Last year, the New Zealand and American companies made a second deal to manufacture and market cheese and dairy ingredients.
It stood to lift Fonterra's turnover in the US by $150 million to $1.3 billion.
But Mr Hanman told 850 delegates at the World Dairy Summit at Auckland's Aotea Centre that the terrorism had caused great uncertainty.
nzherald.co.nz/dairy
International Dairy Summit special report