Environment

The United Nations is developing an early-warning system for tsunamis in the Indian Ocean. But delays -- and false alarms -- have caused at least one country hit by last year's deadly tsunami to voice its frustration with the U.N. agency in charge of building the system.

One year ago, the South Asian tsunami left nearly 170,000 people dead or missing in the Indonesian province of Aceh alone. The United Nations estimates that many of the 450,000 people displaced by the tsunami still need permanent housing.

One year ago, the South Asian tsunami left nearly 170,000 people dead or missing in the Indonesian province of Aceh alone. The United Nations estimates that many of the 450,000 people displaced by the tsunami still need permanent housing.

Sunday marks six months since the deadly Indian Ocean tsunami struck Asia and coastal areas of East Africa. Ed Gordon gets an update on recovery efforts from Christian Science Monitor correspondent Scott Baldauf, Naomi Wyles with the International Medical Corps and Dr. Mohammad Akhter with InterAction.