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Since 2007, Congress has passed 20 temporary funding extension to keep the FAA running, as disputes over spending, labor rules, safety issues and cross-country airline routes have held up a long-term deal.

Because Congress failed to pass another funding extension by a July 23 deadline, the FAA has issued stop-work orders for more than 200 airport construction projects nationwide. The move has effected at least 70,000 construction-related jobs while furloughing almost 4,000 agency employees.

Mr. LaHood said the partial shutdown won’t compromise air safety and that essential employees such as air traffic controllers will keep working. Forty airport safety inspectors were furloughed but remain on the job, using their own credit cards for expenses.

The shutdown also has prevented the FAA from collecting about $30 million a day in certain airline ticket fees - a number that would exceed $1 billion by the time Congress is scheduled to return to Washington in early September.

The House and Senate passed separate long-term FAA funding authorization bills earlier this year, though the two chambers have been unable to reach a compromise on a combined version.