Megan Leavey, a U.S. Marine Corps Veteran, says that canines trained in attacks and explosives helped on the field by detecting improvised explosive devices in time.
For full interview [click here](https://cheddar.com/videos/the-most-extraordinary-dogs-in-the-nation).
A semi-trailer truck driver was killed when a train derailed and a bridge collapsed, spewing coal and mangled train cars across a highway near Pueblo, Colorado, on Sunday, authorities said.
