The Greyhound bus terminal in Oklahoma City is adding a second trip a day to El Paso, Texas, to handle the large number of people traveling to Mexico for Christmas.
But how many of those return is a question many people are asking because of state and federal crackdowns on illegal immigration.
Mexican officials say they don't know exactly how many people are returning to Mexico. But U.S. Department of Homeland Security spokeswoman Pat Riley says many Hispanics are clearly leaving the U.S.
The exodus comes as federal officials are beginning to raid workplaces and increase border patrols. And in Oklahoma a state law prohibits undocumented immigrants from getting driver's licenses and public services. It also makes it a crime to transport, conceal or harbor those immigrants.