Each morning, Sean Moore loads up a 1969 Ford Vanette with cupcakes made at a bakery he co-owns with his wife. Once he finds a parking spot, he tells his customers through social media sites where he is -- and how long he'll be there. Jeff Brady/NPR hide caption

itoggle caption Jeff Brady/NPR

BP America CEO Lamar McKay and other Big Oil executives testify Tuesday on Capitol Hill. BP may be forced into losing its place among oil giants because of sanctions from the U.S. government over the oil spill in the Gulf. Haraz N. Ghanbari/AP hide caption

itoggle caption Haraz N. Ghanbari/AP

Andrew Romanoff is challenging incumbent Colorado Sen. Michael Bennet for the Democratic nomination. Ed Andrieski/AP hide caption

itoggle caption Ed Andrieski/AP

Supporters of soft-drink taxes haven't succeeded on the national stage, but a state-by-state approach seems to be working. iStockphoto.com hide caption

itoggle caption iStockphoto.com

Dan Gates, with Albuquerque's Air Quality Division, measures pollen in the air. Despite a 1994 city ban on trees like mulberry, elm and cottonwood, residents have to wait decades for existing trees to die before pollen levels likely will go down. Jeff Brady/NPR hide caption

itoggle caption Jeff Brady/NPR

This painting depicts the last days of the Pony Express as telegraph lines were being raised out West. The Express ran for approximately 19 months and was formally discontinued on Oct. 26, 1861. Courtesy Pony Express National Museum hide caption

itoggle caption Courtesy Pony Express National Museum