Neil Johnson, a University of Miami physicist, developed this mathematical formula to predict insurgent attacks in war zones. Courtesy of Neil Johnson hide caption

itoggle caption Courtesy of Neil Johnson

House Speaker John Boehner has represented Ohio's 8th Congressional District since 1990. His constituents have been paying close attention to his role in the debt-ceiling negotiations. J. Scott Applewhite/AP hide caption

itoggle caption J. Scott Applewhite/AP

New Mexico chili peppers are distinct, but locals in the pepper industry have been struggling to compete with the foreign pepper market. A new state law requires that only New Mexico-grown peppers are labeled as such. Danise Coon/AP/NMSU Chile Pepper Institute hide caption

itoggle caption Danise Coon/AP/NMSU Chile Pepper Institute

McCarran International Airport in Las Vegas has had to put off a construction project because Congress failed to pass a short-term extension of the Federal Aviation Administration's budget. The hold-up has caused construction layoffs. Ted S. Warren/AP hide caption

itoggle caption Ted S. Warren/AP

Campers Mary Church and Jimmy Cong use their sense of smell to detect whether a chemical reaction has taken place. Amy Standen for NPR hide caption

itoggle caption Amy Standen for NPR