Explosions during the filming of the PG-13 hit The Dark Knight in Chicago in 2007.
Nam Y. Huh/AP
December 9, 2013 Watching violent movies makes teenagers more aggressive, and that violence is almost always associated with sex, drinking and smoking. Violent characters in PG-13 movies are as likely to indulge in violent activities as those in R-rated flicks.
Gun violence has become increasingly common in PG-13 movies like The Avengers, released in 2012.
November 11, 2013 Banning R-rated movies for your kids isn't enough to spare them from scenes of gun violence. The amount of gun violence in R-rated films has stayed fairly stable since 1985, while gun violence in PG-13 movies has soared.
An ambulance makes its way through revelers in Cardiff city center in Wales in 2010. New measures in the city have reduced injuries caused by violence.
Matt Cardy/Getty Images
September 19, 2013 People who show up wounded at a hospital often don't tell police. When a hospital in Cardiff, Wales, shared that information without naming names, the toll of violence dropped, and the city saved $11 million a year on health care and policing. Other British cities are adopting the program.
Somali women and children wait to get medicine in July 2008, from a clinic run by Doctors Without Borders about 20 miles south of Mogadishu.
August 14, 2013 After suffering dozens of attacks against staff members, including kidnappings and murders, the nonprofit is closing all operations in Somalia. In many parts of the country, the aid group was the only source of health care.
A police officer guards Cambodia's famed temple of Angkor Wat. The powerful city-state collapsed in 1431 after suffering through two decades of droughts.
August 2, 2013 In one analysis, economists predict that extreme weather could boost the number of international conflicts by as much as 50 percent by 2050. Higher temperatures might also increase the rates of murder, rapes and domestic violence, they say because aggression seems to rise with the mercury.
Members of the 18th Street gang announce a truce during a press conference at a prison in San Pedro Sula on May 28.
Leonel Cruz/AFP/Getty Images
June 12, 2013 When visiting San Pedro Sula, the bloodiest town in Honduras, it's advisable to arrive early in the morning, when the drug gangs are still asleep.
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June 29, 2011 Today on Talk of the Nation, political junkie Ken Rudin and what people mean when they talk about a party's "base," Eddie Bocanegra and Alex Kotlowitz from the documentary The Interrupters, and innovators talk about where ideas come from.
January 11, 2011 Political affiliation influenced people's views, with Republicans thinking it less likely, according to the poll. Nearly 70 percent of Republicans saw no link. That dropped to 50 percent for Democrats. Independents reflected the overall split.
April 2, 2010 As Newark celebrates — if that's the right word — a murder-free month, Washington, D.C., is still reeling from a shooting this week that was the deadliest in years, leaving four people dead and five others wounded. It happened in an area that pe...
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