Safety advocates have been pressuring Canadian and U.S. officials to create new safety standards for tank cars and to make old DOT-111s like this one more puncture-resistant. Nati Harnik/AP hide caption

itoggle caption Nati Harnik/AP

The view inside Wrigley Field during a 1959 Cubs game. The stadium was built in 1914 and celebrates its centennial this year. AP hide caption

itoggle caption AP

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