National

Copyright 2016 NPR. To see more, visit http://www.npr.org/.

Copyright 2016 NPR. To see more, visit http://www.npr.org/.

Copyright 2016 NPR. To see more, visit http://www.npr.org/.

Copyright 2016 NPR. To see more, visit http://www.npr.org/.

The head of the Transportation Security Administration is promising the agency will do a better job of staffing enough officers at airport security checkpoints to reduce long lines. But he says those long lines are likely to continue through the peak summer travel season.

Travelers at some airports have been waiting two to three hours or more to get through screening. As a result, thousands have missed their flights in recent weeks.

The problem has been particularly bad at Chicago's airports.

Copyright 2016 NPR. To see more, visit http://www.npr.org/.

Copyright 2016 NPR. To see more, visit http://www.npr.org/.

The National Rifle Association endorsed Donald Trump on Friday, just before the apparent Republican nominee addressed its annual conference in Louisville, Ky.

"To get the endorsement, believe me, is a fantastic honor," Trump said, adding that he and his sons are members of the NRA. "They're much better shooters than I am," he said.

"They have so many rifles and so many guns, I tell you, sometimes even I get a little concerned," Trump said.

A new label on some of the steaks in your grocery store highlights a production process you may never have heard of: mechanical tenderizing.

This means the beef has been punctured with blades or needles to break down the muscle fibers and make it easier to chew. But it also means the meat has a greater chance of being contaminated and making you sick.

The labels are a requirement from the U.S. Department of Agriculture that went into effect this week.

The new, redesigned "Nutrition Facts" label is coming. The Food and Drug Administration has announced that the new label will be required on most packaged food by July 2018.

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