A customer examines heirloom tomatoes at

A customer examines heirloom tomatoes at a farmer's market near the White House.

A customer examines heirloom tomatoes at a farmer’s market in Washington, DC on August 19, 2010. The open-air market located just north of the White House, boasts of as many as 20 vendors where fresh produce, seafood and cheeses can be purchased every Thursday through October 29. AFP PHOTO/Abdullah Pope (Photo credit should read Abdullah Pope/AFP/Getty Images)