For up to 90 seconds on April 28, air traffic controllers' screens essentially went dark, causing them to lose the ability to track or communicate with airplanes flying in and out of Newark Airport. CBS News senior transportation correspondent krisvancleave reports that while the FAA is still investigating exactly what went wrong, the incident was so upsetting that about a half dozen air traffic controllers went on trauma leave as a result of the experience. #ewr #newark #newjersey #travel