This photo provided by Transportation Safety Board shows a train with derailed tankers at the Bonny Brook bridge in Calgary, Alberta Canada on Thursday, June 27, 2013. The City of Calg

 

              This photo provided by Transportation Safety Board shows a train with derailed tankers at the Bonny Brook bridge in Calgary, Alberta Canada on Thursday, June 27, 2013.  The City of Calg
This photo provided by Transportation Safety Board shows a train with derailed tankers at the Bonny Brook bridge in Calgary, Alberta Canada on Thursday, June 27, 2013. The City of Calgary says conditions have stabilized at the site of the bridge collapse that caused six cars to derail and start sinking into the Bow River. Canadian Pacific Railway says five of the cars are carrying a petroleum product used to dilute raw oilsands bitumen. The city's acting fire chief has said crews are stringing a cable through the railcars and securing it to bulldozers on land. The industrial area near the bridge has been evacuated and booms are being deployed down river in case of any spills. There are no homes nearby, but several business are effected. (AP Photo/Transportation Safety Board via The Canadian Press)