Mayeli Vasallo (left) and Jorge Monte pump gas in Miami in April. The average price of a gallon of gas has dropped 20 cents in the last month, to $3.73. Joe Raedle/Getty Images hide caption

itoggle caption Joe Raedle/Getty Images

President Obama talks with actor George Clooney during a White House meeting about Sudan in 2010. The president is attending a fundraiser at Clooney's house Thursday, along with a few sweepstakes winners. Pete Souza/The White House hide caption

itoggle caption Pete Souza/The White House

Stone Hedge, a 10,000-square-foot Detroit mansion built in 1915 is listed at less than $450,000. Jessica J. Trevino/Detroit Free Press hide caption

itoggle caption Jessica J. Trevino/Detroit Free Press

Actor George Clooney is led away in handcuffs from Sudan's embassy in Washington, D.C., on Friday. Clooney, his father, Nick, and others including Democratic Rep. Jim Moran of Virginia and NAACP President Ben Jealous, were arrested as they demonstrated to bring attention to the humanitarian crisis in Sudan. The Washington Post/Getty Images hide caption

itoggle caption The Washington Post/Getty Images

Rep. Dennis Kucinich, D-Ohio, thanks his wife, Elizabeth, while conceding defeat in his race against Rep. Marcy Kaptur at Rubin's Restaurant and Deli in Cleveland on Tuesday. Amy Sancetta/AP hide caption

itoggle caption Amy Sancetta/AP

Rick Santorum signs Joe Boulus' apron at a Lenten fish fry Friday in Michigan. Mitt Romney is ahead of Santorum among Catholic voters in the state, despite the fact that Santorum is Catholic. Scott Olson/Getty Images hide caption

itoggle caption Scott Olson/Getty Images

This 1957 DeSoto Fireflite is on display at The Henry Ford Museum in Dearborn, Mich. Courtesy of The Henry Ford Museum hide caption

itoggle caption Courtesy of The Henry Ford Museum

A visitor looks at a Citroen diesel engine at the Geneva Motor Show in Switzerland in 2010. Diesel is popular in Europe but not the U.S.; now, automakers are giving the technology more consideration as a means to meet new fuel economy standards. Martin Meissner/AP hide caption

itoggle caption Martin Meissner/AP

Detroit Auto Show photographers sometimes mistake car designer Christine Park for a spokesmodel. "It's a very male-dominated field," she says, "so it's something that people don't expect." North American International Auto Show hide caption

itoggle caption North American International Auto Show

Ford's MyFord Touch interface allows users to manage phone calls, navigation, entertainment and the car's temperature through a touch screen on the dashboard. Stuart Ramson/AP hide caption

itoggle caption Stuart Ramson/AP

The 2012 Dodge Dart is unveiled at the North American International Auto Show in Detroit on Monday. Tony Ding/AP hide caption

itoggle caption Tony Ding/AP