NS Northbound Local Freight Train A20 ( Wilton to Birmingham, Al. ) passing through 43rd Street in Birmingham, Al. with the class PR43C leading the way. The PR43C is built by Progress Rail Services with a 4,300 Horsepower Caterpillar Engine, a 3,600 Horsepower C175 & a 700 Horsepower C17 Caterpillar Engine |