Latino USA goes inside the biggest free health clinic in the country, which serves only people without insurance. There are nearly 28 million uninsured people in the United States, and for some of them, free clinics are their safety net. For undocumented people, healthcare options are very limited. For this story, we spend three days behind the scenes at CommunityHealth in Chicago, where more than half of the patients speak Spanish. We shadowed doctors and patients to observe the daily dramas that unfold there and listen in on intimate conversations—all to try to capture a snapshot of how life as an undocumented person can affect an individual's physical and mental health.