WASHINGTON (AP) -- A new report shows that President Barack Obama is a long way from reaching his goal of locking down the world's nuclear weapons material by next year.

The report by the U.S.-based Nuclear Threat Initiative grades the 32 countries that are believed to possess such material and concludes that there is not yet even a global consensus about what the priorities should be or how materials should be tracked and protected.

The assessment comes ahead of a second summit of world leaders on nuclear security set to convene in March in Seoul.

The goal of completely securing the world's nuclear stocks was perhaps rhetorical -- it was a pledge Obama against the backdrop of a castle in Prague in 2009, when his presidency was new. But Obama won significant pledges from some countries to winnow or eliminate nuclear weapons materials.