United Airlines pilots picket for higher pay before busy summer travel season: "Time for the company to step up"

As experts forecast record-breaking summer travel numbers, pilots from United Airlines arranged picket lines at major airports on Friday as they push for higher pay. 

The pilots, who fly for one of the world's biggest airlines, have been working without a raise for more than four years while negotiating with airline management over a new contract. 

Even though the pressure is building, the United pilots are unlikely to strike anytime soon. Federal law makes it very difficult for unions to conduct strikes in the airline industry, and the last walkout at a U.S. carrier was more than a decade ago.