Until this year, Pyongyang has denied U.S.accusations it possessed a covert HEU, or highly enriched uranium program, in violation of previous agreements.

VOA: standard.2009.09.06

Mr.Abbas urged the United States to pressure Israel's hawkish new government to uphold previous peace agreements and agree to the creation of a Palestinian state.

VOA: standard.2009.04.17

Scientists warn the impact of climate change is hitting the world faster than previous predictions by Pachauri's IPCC, which amounts to a more conservative consensus of top world researchers.

VOA: standard.2009.03.12

But as it swelled, the watching world was aware that the vision of peace, music and community it represented was a gentle protest against the previous generation's way of life.

VOA: standard.2009.08.15

A previous study by Clayton's lab had shown that, as a young finch first learns how to sing, hundreds of genes in its brain quickly respond, producing more or less protein.

VOA: standard.2010.04.05

In previous years, the U.N.Children's Fund has classified Haiti as a country 'in crisis.' Since the devastating earthquake struck, UNICEF has increased its efforts to restore shattered lives and protect children and women who are among the most vulnerable victims of this disaster.

VOA: standard.2010.02.04