In Dallas, compressed natural gas (CNG) cabs get to cut in front of regular gas cabs at the Love Field Airport pick-up line. Justin Sullivan/Getty Images hide caption

The crowd cheers during last year's Conservative Political Action Conference in Washington. Jose Luis Magana/AP hide caption

Nathan Kress (Freddie), Miranda Cosgrove (Carly) and Jennette McCurdy (Sam) of Nickelodeon's iCarly. Lisa Rose/Nickelodeon/PR Newswire hide caption

Yasim Raashid says many Pakistanis do not believe Davis is a diplomat as the Americans say, but more likely a security operative along the lines of the much-loathed Blackwater, now called Xe. Sajid Memood/ hide caption

Passengers wait in line at the United ticket counter at O'Hare International Airport in Chicago. Frank Polich/Getty Images hide caption

Julie Capper stands with her hologram at Manchester International Airport. Julie and her hologram work in the same area — which has created some confusion. Courtesy of Manchester International Airport hide caption

The USS Enterprise passes behind a mosque as it makes its way through the Suez Canal in the city of Suez, Egypt, on Aug. 1, 2007. Ben Curtis/AP hide caption

Former Laotian Gen. Vang Pao addressed thousands of supporters when he spoke at the Hmong International New Year's Celebration Wednesday, Dec. 26, 2007 in Fresno, Calif. Pao, who died Jan. 6, remains a hero to many in the Hmong community for leading guerilla fighters, supported by the U.S. and armed by the CIA, in battling Communist forces during the Vietnam War. Gary Kazanjian/AP hide caption

One of several billboards put up by XXXChurch.com in advance of Sunday's Super Bowl. The nonprofit ministry aims to help those battling pornography addictions. XXXChurch.com/via Flickr hide caption