After dealing with the debt crisis, Senate negotiators tried and failed Tuesday to end a stalemate over temporary funding for the Federal Aviation Administration, leaving 4,000 F.A.A. employees out of work and relying on airport safety inspectors to continue working without pay.
The partial F.A.A. shutdown, which began July 23 and is likely to continue at least through Labor Day, has also idled tens of thousands of construction workers on airport projects around the country. Dozens of airport inspectors have been asked by the F.A.A. to work without pay and to charge their government travel expenses to their personal credit cards to keep airports operating safely.