US lifts ban on New Zealand naval ships "While we acknowledge that our countries continue to have differences of opinion in some limited areas, today we have affirmed that we are embarking on a new course that will not let these differences stand in the way of greater engagement on security issues," Panetta added. The Australia, New Zealand, United States Security (ANZUS) treaty was suspended between Wellington and Washington in 1986 amid concerns in Wellington about French nuclear tests in the South Pacific and US foreign policy. In return, the United States prohibited New Zealand naval ships from docking at American ports and bases. But Coleman ruled out any change to New Zealand's nuclear-free policy. "We are in a new era and I don't think we should get hung up about trying to turn the clock back to pre-1986 because the reality is the relationship is very, very good," Coleman said. In terms of restrictions from the New Zealand side we are very clear about our policy and the US has been very understanding about that ... And we've moved on from the point where that is an issue. President Barack Obama's administration has pushed to bolster military ties across the region as part of a strategic shift towards the Asia-Pacific, driven by concerns over China's growing power. Panetta's trip to New Zealand was the first by a Pentagon chief in 30 years and the first since the ANZUS treaty was suspended between the two countries. The Pentagon chief later visited the World War II Hall of Memories overlooking Auckland, paying respects to war dead, and then presented medals to five New Zealand troops who served in Afghanistan. Panetta's trip follows US Secretary of State Hillary Clinton signing an agreement in 2010 formalising a thaw in relations with Wellington, which called for deeper co-operation in combating climate change, the spread of nuclear weapons and extremism. It also committed the two sides to promoting renewable energy and boosting capacities to fight natural disasters.