According to the FAA, all prospective air traffic controllers "must have the capacity to perform the essential functions of these positions without risk to themselves or others. Candidates must be physically and mentally fit and meet standards for vision, hearing, cardiovascular, neurological and psychiatric health."

White House Press Secretary Karoline Leavitt said Friday that the “glitch this morning at Newark” was caused by the same issues as last week.

The blackout included losing radar for about 90 seconds at Newark Terminal Radar Approach Control at 3:55 a.m. local time, a source with knowledge of the incident tells CNN.