The service is a branch of the Transportation Security Administration (TSA) that oversees security on airline flights, and includes undercover officers who are armed and fly aboard planes to thwart potential attacks.

A TSA inspector general's report last month said some managers have created a hostile work environment for air marshals through their insults toward women, minorities, veterans and gays.

The report also said the air marshals' management did not cooperate well within the organization and found a lack of compliance with directions from their headquarters.