India, Oct. 1 -- The government will shut down at midnight on Wednesday unless lawmakers reach a deal to extend funding. Essential services will keep running, but many federal programs and workers will be affected.

Let's know what will remain open and closed during the government shutdown.

* Social Security, Medicare, Medicaid: Checks and coverage continue, but delays may happen.

* Air travel: Airports stay open. TSA and air traffic control keep working, but longer lines and delays are possible.

* Military and National Guard: Operations continue. Troops work without pay until the shutdown ends. The Guard still reports for duty.

* Immigration and border agencies: ICE and CBP continue normal operations.

* Postal Service: USPS is not a...