A police officer was shot and killed in the line of duty at a hospital in North Carolina on Saturday, authorities said.

Four are dead and 11 others were injured when a driver lost control of a vehicle while moving at a high speed, crashing into a business in Tampa, Florida.

More than 700 flights nationwide have been canceled Saturday as the FAA continues limiting flight capacity at 40 major U.S. airports amid the government shutdown.

In a 106-decision, Trump-appointed Judge Karin Immergut made permanent an order she issued last month blocking the deployment into the city.

ABC News' Elizabeth Schulze reports on weak financial data raising fresh concerns about the economy.