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Champion bike racer Lance Armstrong used performance enhancing drugs to win his record seven consecutive Tour de France victories, according to a new book. David Walsh, a sports journalist and author of From Lance to Landis: Inside the American Doping Controversy at the Tour de France, talks with Steve Inskeep.

Violent crimes are on the rise across America for the second year in a row, according to a new FBI report. Some argue that an increase in violent acts by teenagers is a public health issue. Advocates discuss applying their unique approach to the streets of Chicago.

Some of the most vulnerable victims of the hurricane in Haiti are known as "Restavecs," children given away by their own families to perform domestic labor in exchange for food and shelter. Jean-Robert Cadet, an author and former child laborer, describes his own childhood experience and his work with Haitian "restavecs".

Global Village host Betto Arcos shares four 21st-century interpretations of cumbia, a traditional music from Colombia and Panama.

The Serbian guitarist fell in love with American blues music as a kid — well before she could understand the words.

KPFK's global music DJ recently visited Brazil, and he brings NPR's Arun Rath a stack of new music he discovered there.

From popularizing a feared subject to scaling down high-tech tools, here are two examples of experts solving complicated problems with simplicity.

The fiddler, singer and songwriter's new Christmas album takes a realistic measure of the season.

Republican Sen. John McCain has chosen Alaska Gov. Sarah Palin as his presidential running mate, a surpise decision that pundits scrambling to learn more about the first-term governor. NPR's John Ydstie offers analysis on Palin's selection and what it means for McCain's prospects in November.

The Democratic National Convention was gaveled to order Monday in Denver. The convention gives Barack Obama an opportunity to reassure voters about his values and readiness to be president. That task began Monday when an ailing Ted Kennedy passed the torch to Obama, and then Michelle Obama spoke about her husband.