Jim Ryun , left .
Marty Liquori , the pre-eminent milers of their day , left the pack far behind as they ran for the finish line on May 16 , 1971 , at Franklin Field in Philadelphia .
Jim Ryun , left , and Marty Liquori , the pre-eminent milers of their day , left the pack far behind as they ran for the finish line on May 16 , 1971 , at Franklin Field in Philadelphia .