LE BLANC MESNIL, France Small, mobile groups of youths hit Paris' riot-shaken suburbs with waves of arson attacks, torching hundreds of cars, as unrest entered its second week Friday and spread to other towns in France. A woman on crutches was doused in flammable liquid and set on fire earlier this week as she tried to get off a bus in a Paris suburb, a judicial official said Friday. She suffered severe burns. In the eastern city of Dijon, teens apparently angered by a police crackdown on drug trafficking in their neighborhood set fire to five cars, said Paul Ronciere,...