Tens of thousands of planes take off, land and perform touch-and-goes at the Marana Regional Airport in southern Arizona every year. Without an air traffic control tower, it's a calculated dance that requires communication by pilots.

Tens of thousands of planes take off, land and perform touch-and-goes at the Marana Regional Airport in southern Arizona every year.

A midair collision between two small planes near Marana Regional Airport in Arizona resulted in two deaths and highlighted safety concerns at non-towered airports, where pilots rely on radio communication and visual cues to navigate.