Southwest cancels hundreds more flights; passengers stranded

Unclaimed baggage piles up between carousels for passengers arriving Sunday on Southwest Airlines flights at Denver International Airport in Denver. (AP Photo/David Zalubowski)

DALLAS — Southwest Airlines canceled more than 350 flights Monday following a weekend of major disruptions that it blamed on bad weather and air traffic control issues. The pilots union accused the company of a botched response to what it said would have been a minor challenge for other airlines.