Washington Dulles International Airport

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United Airlines passengers wait at the ticket counter of Washington Dulles International Airport in Chantilly, Va. (Associated Press)

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Republican presidential candidate Mitt Romney and his campaign strategist Stuart Stevens (right) arrive Oct. 17, 2012, at Washington Dulles International Airport in Chantilly, Va. (Associated Press)

A passport and landing card are seen with a note that a banana, pork and seeds for planting were all seized and destroyed from this particular passenger at Washington Dulles International Airport on Thursday, Feb. 16, 2012. "S/D" is the notation for "seized and destroyed," which is the legal action that Customs and Border Patrol officers must take when they find illegal items. They also have the option to fine passengers $300, but they only do so if the passenger has blatantly lied about carrying illegal items. Some people don't realize that the items they are bringing in are forbidden. (Barbara L. Salisbury/The Washington Times)

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A Customs and Border Protection officer tapes up a package after opening it for inspection at Washington Dulles International Airport on Thursday, Feb. 16, 2012. (Barbara L. Salisbury/The Washington Times)

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A man's eyes can be seen above his high stack of luggage as he waits in line in the secondary screening area to be checked by Customs and Border Protection at Washington Dulles International Airport on Thursday, Feb. 16, 2012. Most people with this much luggage get flagged for secondary screening, because they are likely bringing in foodstuffs, some of which may be forbidden. (Barbara L. Salisbury/The Washington Times)

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A couple tries to explain to Customs and Border Protection about items in their suitcase at Washington Dulles International Airport on Thursday, Feb. 16, 2012. People are allowed to keep items as long as they are not on an ever-changing list of what is and what is not allowed. This list changes depending on epidemics and outbreaks in different parts of the world that may make bringing certain items like poultry or plantlife dangerous. (Barbara L. Salisbury/The Washington Times)

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This African dwarf crocodile bag, and the leopard skin underneath it, were both seized by Fish and Wildlife after passengers tried to bring them through customs at Washington Dulles International Airport. Any items made from endangered animals are strictly forbidden to bring into the United States. In some cases the items must be returned to the country of origin. This picture was made Wednesday, Feb. 8, 2012. (Barbara L. Salisbury/The Washington Times)

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A passenger waits with all his belongings scattered on the table at the Agriculture section of the secondary inspection area of customs at Washington Dulles International Airport on Wednesday, Feb. 8, 2012. Customs and Border Protection officers must check for contraband, including fresh fruits and plant life that can introduce foreign species into the U.S. ecosystem and cause damage. (Barbara L. Salisbury/The Washington Times)

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Officer Steve Whittaker uses a magnifying glass to get a better look at the ingredients on a canned meat product that was in a passenger's bag at Washington Dulles International Airport on Thursday, Jan. 19, 2012. Customs and Border Protection agriculture officers must not only be able to identify alien pests and insects, but they also must constantly monitor the CDC to be aware of what items are forbidden from specific countries due to outbreaks and illnesses. (Barbara L. Salisbury/The Washington Times)

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Passengers arriving at Washington Dulles International Airport in this Thursday, Jan. 19, 2012, file photo, walk past a U.S. Customs and Border Protection sign. (Barbara L. Salisbury/The Washington Times) ** FILE **

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Kyra DeStefano, 7, of Ashburn, Va., and her mother, Secili De Stefano, are overjoyed to be at Washington Dulles International Airport for the flyover and landing of Space Shuttle Discovery on Tuesday. (Andrew Harnik/The Washington Times)

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Drew Schwartzman, left, 5, of Baltimore, Md., and Alexander Leigh, 3, of Round Hill, Va., play with toy shuttles outside the Smithsonian Air and Space Museum's Udvar-Hazy Center in Chantilly, Va., on Tuesday, April 17, 2012 as they wait for the space shuttle Discovery to fly by on its way to Washington Dulles International Airport. (Barbara L. Salisbury/The Washington Times)

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The space shuttle Discovery, atop a 747 carrier aircraft, makes a flyover at Dulles International Airport in Chantilly, Va., on April 17, 2012. Discovery, the longest-serving orbiter will be placed to its new home, the Smithsonian's National Air and Space Museum's Steven F. Udvar-Hazy Center in Chantilly. (Associated Press)

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Space shuttle Discovery, atop a Boeing 747 carrier jet, departs from the Kennedy Space Center on Tuesday, April 17, 2012, in Cape Canaveral, Fla., on its way to the Smithsonian's National Air and Space Museum facility near Washington Dulles International Airport. (AP Photo/John Raoux)