Caltech biochemical engineer Frances Arnold was awarded a National Medal of Technology and Innovation by President Obama in 2013. Jason Reed/Reuters/Landov hide caption

itoggle caption Jason Reed/Reuters/Landov

Protesters gather outside the Albuquerque Police Department following the shooting deaths of James Boyd and others on March 25. The Justice Department accused the police of engaging in a pattern of excessive force. Rita Daniels /NPR hide caption

itoggle caption Rita Daniels /NPR

Lynn Eldredge works as a facilities manager for several fast-food restaurants in Utah. At 50, he has no benefits and no retirement savings. Courtesy of Lynn Eldredge hide caption

itoggle caption Courtesy of Lynn Eldredge

Nick Marino feeds and waters the livestock at Deep Springs College, an exclusive, all-male institution in a remote valley in California. Brian L. Frank/Redux hide caption

itoggle caption Brian L. Frank/Redux