Author: John Cox, Special to USA TODAY

John Cox, a retired airline captain with US Airways who runs an aviation safety consulting company, answers your questions.

This week, Capt. John Cox tackles the issue of connecting through airports in states that require visitors from COVID-19 hotspots to quarantine.

This week, readers ask about the safety of flying first class nonstop and the use of ultraviolet light to sanitize airplane lavatories.

This week, retired pilot John Cox answers your question about HEPA filter maintenance and how they mitigate the chance of contracting COVID-19.

This week, retired pilot John Cox talks about what kind of damage turbulence can do to a plane and how co-pilots came to be called first officers.

Capt. John Cox explains why the process to recertify the Boeing 737 Max has taken over a year and why he’d be willing to take a leisure flight now.

This week, retired US Airways pilot John Cox tackles the deboarding process and what would happen if both pilots became incapacitated.

The number of passengers definitely can change the performance of any airplane. Before every takeoff, the pilots compute the weight and balance.

This week, Capt. John Cox explains how the HEPA filters on commercial jets remove virus particulates from the cabin air.

Retired US Airways Captain John Cox explains why he’d get on a domestic flight and gives an update on aircraft production during the pandemic.