The purpose of this research is to understand why some groups of people do not join clinical trials as much as others. These groups can include people from different racial or ethnic backgrounds, people with lower incomes, people who live in rural areas, and people who speak different languages. Investigators interview participants to learn about their experiences with clinical trials. By learning from them, investigators hope to find better ways to help more people learn about, join, and stay in clinical trials so that research is fair and helpful for everyone.