New Hampshire health and safety officials will soon begin distributing potassium iodide pills to people living near the Seabrook and Vermont Yankee nuclear power plants. Potassium Iodide, also known as KI, protects the Thyroid gland in the event of a nuclear accident?..But as the state?s new distribution policy nears completion, people on all sides of the issue agree getting the pills to all those who want them will pose challenges.