Government shutdown continues to add to stress on air traffic controllers and disrupt flights

The ongoing government shutdown continues to disrupt flights at times and put pressure on air traffic controllers who are working without pay .

Flights were delayed Thursday at New York's LaGuardia Airport, New Jersey's Newark airport and Washington’s Reagan National Airport because of air traffic controller shortages . The number of flight delays for any reason nationwide spiked to 6,158 Thursday after hovering around 4,000 a day earlier in the week, according to FlightAware.com .