Forty years ago, Saddam Hussein invaded Iran, launching a war that raged for eight years. The late Iraqi dictator also unleashed chemical weapons on Iran. This conflict is considered one of the deadliest in modern history. Today, the survivors of those poison gas attacks still struggle with mental and physical health problems. However, the residents of the Iranian town of Sardasht have not given up their fight for international recognition of the horrific massacre. We tell you more.