Registered nurses Cassie Gregor (from left), Camellia Douglas and Mike Montalto monitor patients in intensive care units scattered around North Carolina. Kevin McCarthy/Carolinas HealthCare System hide caption

itoggle caption Kevin McCarthy/Carolinas HealthCare System

Oil pump jacks in Williston, N.D., in December. Oil prices have been on the rise, but some analysts say the global economic slowdown, fracking and the rise of alternative energy will mean less demand and lower prices. Eric Gay/AP hide caption

itoggle caption Eric Gay/AP

Dalma Cartagena teaches a class on agricultural science to elementary-school students in Orocovis, Puerto Rico. "I'm preparing them to make good decisions when it comes to the environment and healthy foods," she says. Greg Allen/NPR hide caption

itoggle caption Greg Allen/NPR

A pedestrian walks by a Panera Bread restaurant on June 3 in San Francisco. Panera Bread is set to remove artificial colors, flavors, sweeteners and preservatives from items on its menu by the end of 2016. Justin Sullivan/Getty Images hide caption

itoggle caption Justin Sullivan/Getty Images

New Jersey's pension system is more than $80 billion in the red. Gov. Christie mostly blames past governors for sticking him with this bill. "I'm like the guy who showed up for dinner at dessert. ... And I got the check," he said earlier this year. Rogelio V. Solis/AP hide caption

itoggle caption Rogelio V. Solis/AP

Protesters gather April 30 outside Puerto Rico's Capitol building in San Juan to oppose Gov. Alejandro Garcia Padilla's budget proposal. The plan would raise taxes to help cover the state's massive debt. Ricardo Arduengo/AP hide caption

itoggle caption Ricardo Arduengo/AP

President Obama walks away from Marine One in his Nikes on Sunday. He heads to Nike Headquarters later this week. Carolyn Kaster/AP hide caption

itoggle caption Carolyn Kaster/AP