By RIO YAMAT and JOSH FUNK

Staffing shortages led to more flight delays at airports across the U.S. on Tuesday as the federal government shutdown stretched into a eighth day, while union leaders for air traffic controllers and airport security screeners warned the situation was likely to get worse.

The Federal Aviation Administration reported staffing issues at airports in Nashville, Boston, Dallas, Chicago and Philadelphia, and at its air traffic control centers in Atlanta, Houston and the Dallas-Fort Worth area. The agency temporarily slowed takeoffs of planes headed to the first three cities.

Flight disruptions a day earlier also were tied to insufficient staffing during the shutdown, which began Oct. 1. The FAA reported issues on Monday at the airports in Burbank, California; Ne

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