An ICU nurse on wavering between confidence and fear

After a particularly brutal week caring for COVID-19 patients in New York City, ICU nurse KP Mendoza considered one final task: writing a will. He's only 24, but working in the heart of a global pandemic, it felt as if death was stalking him. William Brangham talks with Mendoza about the psychological impact of seeing so much death as health care workers struggle to help patients survive.