Ukraine (CNN) — Olga is running around the intensive care unit, constantly checking her patients’ oxygen levels, adjusting their medication and noting their vitals. She’s working fast, but even at her ...

Late this past summer, I witnessed something that others could have seen, but, like me, they wouldn’t have fully understood what they were watching. It was the ultimate tip-of-the-iceberg experience.

Exclusive by Christiane Amanpour, Madalena Araújo and Ivana Kottasová, CNN. Video by Alex Platt and Mark Baron. Photos by Ivana Kottasová Ukraine (CNN) — Olga is running around the intensive care unit ...