File-In this Tuesday Dec. 13,2011 file photo non-resident visitors to the United States wait in line at immigration control after arriving at McCarran International Airport, in Las

... more 

File-In this Tuesday Dec. 13,2011 file photo non-resident visitors to the United States wait in line at immigration control after arriving at McCarran International Airport, in Las Vegas. Airport administrators say McCarran International Airport in Las Vegas handled almost 41.5 million passengers in 2011, up 4.3 percent from the year before. (AP Photo/Julie Jacobson) less