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Toll plazas all over the country are going automatic, but just at the top of the Florida Keys, there's a tollbooth with people inside.

Airlines netted record profits last year. But concerns remain about terrorism and long security lines.

The country's oldest urban national park spans 1,800 acres in the middle of Washington, D.C.

Farmers change what they grow, expand their herds, and buy new land, changing the surrounding landscape.

The 35-mile long tunnel will provide a high-speed rail link between northern and southern Europe.

The Bible — from Genesis to Revelations — has been translated into emojis. You know, the smiley faces, thumbs up, lightning bolts and other symbols people use in text messages.

Waiting in long lines means lost productivity, but there can be bigger costs to sloppy security.

Thea Oliphant-Wells was homeless and addicted to heroin. Today, she's no longer using and helps those who are.

Author Brian McCabe finds that our belief about home ownership as a way to improve civic life doesn't necessarily pan out

In addition to the presidential contests, there's also a hotly contested race to fill retiring Sen. Barbara Mikulski's seat.