Potholes on Chicago's Lake Shore Drive, one of which is about half-a-car-length long and at least a foot deep. The city of Chicago says it has filled an estimated 240,000 potholes this winter, 100,000 more than last winter, at a cost of more than $2.8 million. David Schaper/NPR hide caption

itoggle caption David Schaper/NPR

A Boeing 787 performs a demonstration flight in 2013. Battery fires, software failures and incomplete pieces have plagued the new high-tech plane. Francois Mori/AP hide caption

itoggle caption Francois Mori/AP

During his January State of the State address, Wisconsin Gov. Scott Walker made the case that extra money should be returned as property and income tax cuts; some Republicans say his proposal goes too far. Andy Manis/AP hide caption

itoggle caption Andy Manis/AP

Amtrak trains on the Empire Builder route, which stops in Williston, N.D., have been facing long delays. Shannon Stapleton/Reuters/Landov hide caption

itoggle caption Shannon Stapleton/Reuters/Landov

A fireball goes up at the site of an oil train derailment in Casselton, N.D., in December. Bruce Crummy/AP hide caption

itoggle caption Bruce Crummy/AP