A rising tide of travelers lifted US Airways (LCC), whose fourth-quarter profit doubled as it carried more passengers. The strong earnings report is an indication that consumers are more confident as the economy continues to recover, although at a slow pace. The fifth largest U.S. airline reported earnings per share of 26 cents, beating analyst consensus by 7 cents. Revenue grew 3.9% to $3.28 billion, roughly in line with expectations. Shares rose