Union Pacific EMD F3A 1430, with GP9 B unit 143B and F7B 1470B following, bring their train from the east into the yard at Laramie, Wyoming on August 15, 1957. Unit 1430 was built in 1948 and retired in 1964; 143B was delivered in 1954 and retired in 1978; and 1470B entered service in 1951 and was retired in 1964. I took this photo from the long footbridge over the UP's Laramie terminal and yard trackage.