Jaydin Blackwell of the U.S., left, celebrates a new world record time of 10.64 with teammate and silver medalist Ryan Medrano in the men's 100-meter T38 race at the Paralympic Games in Paris. AP Photo/Samantha Hurley American track athletes Jaydin Blackwell and Ryan Medrano went 1-2 for Team USA at the Paris Paralympics on Saturday. Medrano, a “Survivor” alum, finished …