Al Drago/Getty Images(WASHINGTON) — As the first government shutdown in seven years got underway on Wednesday, tens of thousands of federal workers face the risk of missing paychecks as broader America braces for the absence of some key services. Starting on Wednesday, 750,000 federal employees are expected to be furloughed, and essential employees will have to work without pay for the duration of the shutdown, according to the nonpartisan Congressional Budget Office. The workers will be placed on leave without pay and will get paid retroactively once the shutdown is over. That’s our sole source of income.”Other federal employees deemed essential — including Transportation Security Administration (TSA) workers, air traffic control workers and U.S. Border Patrol agents — will be required to continue working without pay. Other impacts of the shutdown could also affect national parks, which remain partially open but could face staff shortages during the shutdown.