The Senate has failed to pass a funding bill to reopen the Department of Homeland Security (DHS), prolonging the shutdown that is affecting travelers across the country. The Transportation Security Administration (TSA) is experiencing staffing shortages, with about 10% of employees calling out sick five times the normal rate. The shutdown has already cost the U.S. economy $2.5 billion and is expected to increase as delays increase and more flights are disrupted. Despite the failed vote, there are signs of progress in negotiations with bipartisan lawmakers.