Watch the full show from Thursday, March 25. A special edition on preserving the past: Maintaining Roman antiquities has residents worried about the high cost of history; the challenge of building a new subway line in Rome; Greece battles for ancient sculptures; and, an unchanged Ethiopian town.

Religious politicians are usually considered to be on the right of the ideological spectrum. However, we look at three figures -- Iyad Jamal Al-Din in Iraq, Menachem Froman in Israel and Mehdi Karroubi in Iran -- who advocate pacifism and pluralism yet are grounded in traditional spirituality.

Tonga, a remote chain of 176 lush islands spread over 500 miles of the Pacific Ocean, faces potentially devastating effects from climate change. As part of her series on small islands and climate change, Worldfocus producer Megan Thompson visited Tonga and documented the government's campaign to get the word out about the issue -- both at home and abroad.

Watch the full show from Tuesday, March 23. A special edition on health care challenges around the world: The battle against cervical cancer in Nicaragua; helping more women survive childbirth in Guatemala; the struggle for basic care in Uganda; and, tuberculosis still takes a heavy toll in India.

Watch the full show from Monday, March 22. The Health of Nations special edition: in Chile, how fast you get treated depends on what ails you; in Brazil, emphasis is on medical care for the poor; Singapore's health care is funded by an unusual savings plan; and, Canada saves on admin costs.