Southwest cancels more flights, draws federal investigation

Baggage waits to be claimed at the Southwest Airlines baggage claim Tuesday at Salt Lake City International Airport. (RICK BOWMER/Associated Press)
Baggage waits to be claimed at the Southwest Airlines baggage claim Tuesday at Salt Lake City International Airport. (RICK BOWMER/Associated Press)

DALLAS — Southwest Airlines scrubbed thousands of flights again Tuesday in the aftermath of the massive winter storm that wrecked Christmas travel plans across the U.S., and the federal government sai…