Ted Robbins

Half of all tomatoes eaten in the U.S. come from Mexico, and tomato growers in Florida aren't happy about that. In fact, they're willing to risk a trade war to reverse the trend.

At JC Distributing In Nogales, Ariz., one misstep and you're likely to get knocked over by a pallet full of produce. Forklifts crisscross each other carrying peppers, squash and especially tomatoes from trucks backed into the warehouse loading dock.

"This is a Mexican truck being unloaded," says JC President Jaime Chamberlain. "He's just waiting for his paperwork to get back."

Brad Holland had big plans for the empty lot he owns in midtown Tucson, Ariz.

"This was going to be my dream house before the economy collapsed," Holland says. "I had a big empty lot and said, 'Wow, a lot of good can come out of this.' "

Since the mid-1980s, the U.S. Border Patrol has quintupled in size — growing from about 4,000 to more than 20,000 agents.

The government has constructed some 700 miles of fencing and vehicle barriers. It has placed thousands of ground sensors, lights, radar towers and cameras along the border. And Customs and Border Protection is now flying drones and helicopters to locate smuggles and rescue stranded immigrants.

So here's the question: Is the Southwest border secure?

Congress is considering whether to turn three top-secret sites involved with creating the atomic bomb into one of the country's most unusual national parks.

The Manhattan Project — the U.S. program to design and build the first atomic bomb during World War II — largely took place at three sites: Los Alamos, N.M.; Oak Ridge, Tenn.; and Hanford, Wash. On July 16, 1945, the first test of an atomic bomb took place at a site in the southern New Mexico desert. Hiroshima and then Nagasaki, Japan, were bombed less than a month after the test.

The Department of Homeland Security is examining its policy on deadly force along the U.S.-Mexico border. In less than two years, U.S. Border Patrol agents have killed 18 Mexican citizens there — including eight people who were throwing rocks.

It's a tight race in Nevada, where the vaunted Democratic machine is being challenged by Republicans. The GOP hopes a higher turnout will counter a Democratic registration advantage. Unions — which have half Hispanic membership — and the Obama campaign are doggedly pursuing every voter. Meanwhile, the Romney campaign's Nevada team is doing the same. Early voting ends Friday.

For the first time in nearly a generation, Arizona voters will elect a new senator. Republican Sen. Jon Kyl is retiring after 18 years. His ideological successor is Republican Rep. Jeff Flake, and a lot of people expected Flake to have an easy time of it.

But recent polls suggest Democrat Richard Carmona — a former surgeon general and a Hispanic — has a shot at winning. The race has become heated, and the airwaves are filled with brutal ads.

It's been more than a month since the government began accepting requests for its Deferred Action for Childhood Arrivals program, the Obama administration's policy for young people brought to the U.S. illegally as children. Hundreds of thousands of people are eligible for the program. So far, only 82,000 have applied.

Carlos Martinez is one of the 29 people who have actually gotten deferrals. It means that he won't be deported, and that he can get a work permit. Martinez applied for the deferred action program the first day.

Transcript

SCOTT SIMON, HOST:

It's been more than a quarter century since the federal government enacted any immigration legislation which wasn't about enforcement and over that time, the government has spend hundreds of billions of dollars on fences, aircrafts, detention centers and agents. NPR's Ted Robbins looks at what taxpayer money has bought and why it's not likely to go away, even as budgets shrink and illegal immigration lessens.

The United States' southern border bristles with technology and manpower designed to catch illegal immigrants and drug smugglers. Since 1986, the government has spent hundreds of billions of dollars on fences, aircraft, detention centers and agents.

But even as federal budgets shrink and illegal immigration ebbs, experts say that there's no end in sight for the growth of the border-industrial complex.

A Growing Investment On The Border