The Obama Administration said last week it had not changed its policy and would continue to assess its stance despite completing the first review of Washington's position since 2003.
''While our review is ongoing, our current policy remains in effect,'' a State Department spokesman, Ian Kelly, said on Saturday, on the eve of the Cartagena Summit on a Mine-free World, which runs until Friday.
''We determined that we wouldn't be able to meet our national defence needs, nor our security commitments to our friends and allies if we signed the convention.''
The US remains committed to the use of landmines.
No, they are not alone in in the world China and Russia have refused to sign on to the Ottawa Treaty. But, US President Obama is the Peace prize winner.