Ana's phone rings at 3 AM. International emergency number.

She answers immediately. "Dr. Morales."

"Dr. Morales, this is Dr. Sarah Martinez in Mexico City. We have a situation."

Ana sits up in bed. Diego wakes beside her. "What kind of situation?"

"American family. Father shot. Mother pregnant. Two young children. They need immediate medical care."

"Are they safe?"

"For now. Mexican authorities are protecting them. But the father needs surgery."

"What kind of surgery?"

"Thoracic trauma. ...