On June 27, 1923, the US Army Air Service performed the first successful aerial refueling, where one aircraft passed fuel to another. This innovation greatly increased the range and endurance of aircraft, allowing for nonstop flights across greater distances. It was a key technology for strategic bombing and long-range reconnaissance.

Aerial refueling, though a technical feat, became a powerful symbol for writers and poets representing the extension of human endurance and the ability to overcome geographical limits. It was seen as a 'lifeline in the sky,' a metaphor for survival and connection in the modern world. The image of one plane linking with another to share fuel became a symbol of support and cooperation.