My name is Isela Warren. I’m a 30-year-old travel nurse who has seen enough human suffering to last a lifetime. I’ve held the hands of patients taking their last breaths and comforted families in hospital corridors. After months of non-stop work, I decided to take a short break and surprise my mother in Boston. She had just recovered from heart surgery, and I couldn’t wait to see her face when I showed up unannounced.