The U.S. Food and Drug Administration is warning Americans about the ever-increasing and potentially deadly recreational use of nitrous oxide products, particularly among young people. Marketed with names like "Galaxy Gas" and "Miami Magic," and often sold in steel cartridges known as "whippets ," these products are cheap and readily available at gas stations, convenience stores, smoke shops and major retail outlets, including Walmart. They're also sold online. As an assistant professor of