Hank Krakowski, the head of the FAA's Air Traffic Organization, submitted his resignation Thursday. This comes after an air traffic controller at the Reno-Tahoe International Airport fell asleep for about 16 minutes Wednesday night, marking the fourth incident this year. Across the country, airports are changing their policy, mandating that two air traffic controllers work during overnight hours. Above, a view of the Reno-Tahoe International Airport.