Our signature stories delve into issues around the world -- from the long-term effects of Agent Orange in Vietnam and escalating gang violence in Mexico to discrimination against whites in South Africa and Afghan immigrants in Iran. See our best Signature videos of the year.

Chile has gone further than any other country in privatizing social security, embracing private pension accounts in 1981. But the fund will soon be paying out more than it takes in and is projected to be exhausted by 2036. Worldfocus special correspondent Edie Magnus reports on the health of private social security and new regulation from the Chilean government.

Today is the 25th anniversary of the world's worst industrial accident in Bhopal, India. Last year, Daljit Dhaliwal visited Bhopal while reporting in India. She toured the site of the tragedy and saw how the people of the area still live with the aftermath. Also, in an extended interview, eyewitness Lalit Shastri describes the horror of the event.

Correspondent Mark Litke and producer Ara Ayer report from the Philippines where there are more newspapers in print, more points of view and more influence in broadcast journalism than ever before. But since People Power in 1986, more than 70 journalists have been murdered.

In this wide-ranging interview, Chilean finance minister Andres Velasco speaks about Chile's privatization of social security, its past and present fiscal policy, and the lessons advisors have learned from economic cycles of the past.