Crews work at the scene of a rail bridge collapse and railcars derailment over the Bow River, southeast of downtown Calgary, Canada on Thursday, June 27, 2013. (AP Photo/The Canadian Pr

 

              Crews work at the scene of a rail bridge collapse and railcars derailment over the Bow River, southeast of downtown Calgary, Canada on Thursday, June 27, 2013. (AP Photo/The Canadian Pr
Crews work at the scene of a rail bridge collapse and railcars derailment over the Bow River, southeast of downtown Calgary, Canada on Thursday, June 27, 2013. (AP Photo/The Canadian Press, Larry MacDougal)
Tags: Canada , Work