A thought-provoking and shocking film about the United States is "Bowling for Columbine".

The director, Michael Moore, questions whether the country, which has 200 million firearms and schools that use metal detectors to check students for weapons, is a nation of gun enthusiasts, or just crazy?

The film is based on the Columbine massacre in 1999, where two teenagers killed 12 students and a teacher in Colorado, and asks whether the murder rate would decrease with fewer guns on the street.

Why do 11,127 people die in America each year as a result of gun violence? There are clearly serious problems with the law.

In the film, rock star Marilyn, whose music is often attacked by conservative anti-violence groups, states: "It's a campaign of fear and consumption.

Keep everybody scared and they will consume." But while fear may explain why Americans buy guns, it's rarely why they use them.

Moore explains that this is due to the violent American foreign policy attitudes that teach American children that killing is an acceptable response to conflict.