Washington - The head of the Transportation Security Administration said Wednesday the beleaguered agency will add 768 new screeners by mid-June to deal with increasingly long airport security lines that have caused passengers to miss flights even before the busy summer travel season.

Peter Neffenger told a House committee that a combination of factors contributed to the added waiting time to pass through security screening: more people are flying this year and fewer people than anticipated have applied for the government’s PreCheck program, which expedites screening for those who have submitted to a background check.

The agency expects to screen 740 million passengers this year, a 15 percent increase over 2013, Neffenger said. That increase came amid a 12 percent drop in the TSA’s workforce and “a renewed focus on security,” he said.

“We have a challenge this summer, which we are aggressively meeting head-on,” Neffenger told the House Homeland Security Committee.... Read More: VIN