With so much fuel headed elsewhere, the national average price for a gallon of regular gasoline is now $3.69, compared with $3.53 a month ago, according to AAA. Rich Pedroncelli/AP hide caption

itoggle caption Rich Pedroncelli/AP

Informational pamphlets are displayed during an enrollment fair on the last day before the sign-up deadline at the Bay Area Rescue Mission in Richmond, Calif. Justin Sullivan/Getty Images hide caption

itoggle caption Justin Sullivan/Getty Images

Even some euro bank notes may need a good scrubbing. Like dollar bills, these notes are made from cotton and they harbor an array of bacteria. Thomas Leuthard/The Preiser Project/Flickr hide caption

itoggle caption Thomas Leuthard/The Preiser Project/Flickr

Many of the women who told us their stories said they didn't negotiate terms for their first job offers because they didn't know they could. Thomas Barwick/Getty Images hide caption

itoggle caption Thomas Barwick/Getty Images

The Kalamazoo Promise, a full-tuition scholarship program announced in 2005, created a stir in the city when it launched the following year. Mark Bialek/AP hide caption

itoggle caption Mark Bialek/AP

Round-tripping occurs when American citizens open bank accounts in tax havens such as the Cayman Islands, funnel money into the accounts and then use it to buy stocks and bonds back in the U.S. David McFadden/AP hide caption

itoggle caption David McFadden/AP