Thousands of U.S. troops are getting discharged out of the army. Many suffer from post traumatic stress disorders and brain injuries, and aren't getting the care they need. The Army claims these discharged soldiers have pre-existing mental illnesses or are guilty of misconduct. But health advocates say these are wrongful discharges, a way for the army to get rid of "problem" soldiers quickly, without giving them the treatment to which they're entitled.

NOW covered this issue last summer, and this week we revisit the army's controversial position and follow up with affected soldiers we met. As a result of the media attention from our report and others, the Department of Defense revised its criteria for diagnosing pre-existing conditions and, now, fewer soldiers are receiving the diagnosis, making more of them eligible for care.

Also on the show, we update how the distant Pacific nation of Kiribati is dealing with the reality that both their land and culture could disappear from the Earth due to global warming. Kiribati President Anote Tong is now considering purchasing land abroad to save his people. He says his pleas for international support have largely fallen on deaf ears. Experts predict millions of people will become climate change refugees in the years to come.