No more helmet hair: Hovding's "invisible" helmet is an air bag tucked away in a collar that gets fastened around a cyclist's neck. It's aimed at urban cyclists and priced at $535. Courtesy of Hovding hide caption

itoggle caption Courtesy of Hovding

Swedish firemen extinguish a burning car Tuesday after youths rioted for a third night in a row in the suburbs of Stockholm. The unrest began after police said they shot dead a 69-year-old man wielding a machete in an immigrant neighborhood. Jonathan Nackstrand/AFP/Getty Images hide caption

itoggle caption Jonathan Nackstrand/AFP/Getty Images