The United States launched a drive Tuesday to highlight the plight of 20 women around the world it says have been unfairly imprisoned for their views or political activism, AFP reports.

The "Free the 20" campaign is designed to be tied in to the 20th anniversary of the Beijing declaration, which was signed by 189 countries to promote women's rights as human rights.

Unveiling the program and its promotional hashtag #FreeThe20, Samantha Power, the US ambassador to the United Nations, urged journalists and activists to publicize the 20 cases.