Bicyclists had free rein of Milan's streets Monday during a six-hour ban on private cars in a bid to alleviate persistent smog. Pollution levels in Italy's business capital have exceeded levels considered healthy for more than 30 days straight, prompting officials to ban private cars from 10 a.m. until 4 p.m. Monday through Wednesday this week. Officials said private motorists, who risked steep fines, widely respected the ban on its first day. ...