Strain on nation’s air travel system emerging

The strain of a 34-day partial government shutdown is weighing on the nation’s air-travel system, both the federal workers who make it go and the airlines that depend on them.
Air traffic controllers and airport security agents continued to work without pay — they will miss a second biweekly paycheck on Friday — but high absentee rates raise the threat of long airport lines, or worse.
Unions that represent air traffic controllers, flight attendants and pilots are growing concer