Do more U.S. airports need control towers? That's one of the questions that has arisen following a midair collision at an airport in southern Arizona last week.

Two senators are calling on the Federal Aviation Administration (FAA) to work with Congress to increase its funding and staffing in the aftermath of last month’s deadly plane crash near

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.