When the plane finally touched down safely and emergency medical services rushed on board, the elderly man was stable. As he was wheeled off, he weakly reached out and squeezed Elena’s hand. "You saved my life," he whispered.

"Sir, take deep breaths. I am right here with you," she said, her voice a lifeline in the chaotic cabin.

She signaled to her colleague to fetch the emergency medical kit and the portable oxygen. Working quickly, Elena administered oxygen and checked his vitals while another crew member searched the passenger list for a doctor. Within minutes, they had a retired cardiologist by Elena's side.