John David, 73, teaches an exercise class called PACE to seniors at the 92nd Street Y in New York City. The former TV producer says he has finally found his true calling. Shiho Fukada for NPR hide caption

Tunisian soldiers stand guard as a woman holds up a poster featuring opposition leader Chokri Belaid during his funeral procession in a suburb of Tunis on Feb. 8. Belaid's assassination has laid bare the political rifts in post-revolutionary Tunisia. Fethi Belaid/AFP/Getty Images hide caption

Some companies, frustrated with intrusions into their networks by cyberattackers, are now trying to turn the tables in the ongoing and complicated cyberwar. iStockphoto.com hide caption

A Tesco supermarket sign in London. The chain acknowledged that its low-cost beef lasagna had in fact been 60 percent horse. Sang Tan/AP hide caption

Katherine Webb (left), the girlfriend of Alabama quarterback A.J. McCarron, and McCarron's mother, Dee Dee Bonner (second from left), watch McCarron celebrate after the BCS National Championship college football game on Jan. 7. Webb was caught on camera and announcer Brent Musburger enthusiastically remarked that quarterbacks "get all the good-looking women." ESPN later apologized. John Bazemore/AP hide caption