A free radon program is 6:30 p.m. Tuesday at the Carson City Sheriff's Office, 911 E. Musser St.Put on by the Nevada Radon Education Program of University of Nevada Cooperative Extension, free radon test kits will be available and a certified radon mitigator will be on hand.Radon is a naturally occurring radioactive gas that is present in rocks and soil. It can accumulate in buildings and can cause lung cancer. The U.S. Environmental Protection Agency estimates 21,000 Americans die each year from radon-induced lung cancer, killing more people than secondhand smoke, drunk driving, falls in the home, drowning or fires …