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President Obama and Republican vice presidential nominee Paul Ryan spoke Friday at the annual AARP convention in New Orleans, Medicare and Social Security topped the agenda for both. NPR's Ina Jaffe reports the organization represents millions of older Americans, who are among the most reliable voters.

NPR's Ari Shapiro joins host Scott Simon to preview a pair of pieces he's reported for next week on the political ad wars. He talks about the unprecedented number of ads, the money and how it feels in one community: Colorado Springs.

President Obama and GOP nominee Mitt Romney have made multiple trips to the battleground state of Nevada this year. Romney was there again Friday. Nevada has the worst jobless rate in the nation, and it's a place where recent distractions from Romney's economic message could hurt his chances of winning. NPR's Don Gonyea reports.

Mitt Romney released his 2011 tax return Friday, along with a summary of the tax rates he has paid over the past 20 years. NPR's John Ydstie reports Romney apparently paid more than he had to.

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.

In South Africa, thousands of mineworkers have embarked on industrial action that began with a deadly pay strike by platinum workers. They've agreed a wage deal with their management, this week, but the labor unrest is spreading to other platinum and gold mines in an industry that's the engine of South Africa's economy. NPR's Ofeibea Quist-Arcton discusses the repercussions with host Scott Simon.

Host Scott Simon speaks with Craig Bennett and Michael Miller about being awarded a 2012 Ig Nobel prize for their paper on the brain waves of dead Atlantic Salmon, published in the Journal of Serendipitous and Unexpected Results.

Only 12 days left of Major League Baseball. Host Scott Simon looks at the numbers with baseball historian Bill James.

After saving money for years, Lola Sanchez was finally able to buy a car refitted with a ramp and space for a wheelchair in the back for her teenage son, who has cerebral palsy.

A nurse used to come each day to help with her son's care. That service was cut amid government austerity measures, though Sanchez still gets a small check every month.

"What I need is physical help, even more than financial assistance," Sanchez says, "because I can't physically lift him on my own."