Allyson Felix comes out of retirement for 4x400 relay race - Los Angeles Times
US women through to 4x100m relay final after Olympic scare
Athletics-U.S. take double gold in sprint relays
US women disqualified from 4x400m relay after baton fail - Sports
U.S. women disqualified from 4x400m relay after baton fail
I'm overwhelmed with remorse and disappointment - Alexis Holmes apologizes after US women's 4x400m relay team's World Championships disqualification
Worst baton pass ever? China's catastrophic 4x100 relay handoff
Arop goes from back to front to take 800m gold
Chinese Relay Runners Disqualified After Re-Doing Baton Pass
U.S. track team faces questions ahead of Rio Olympics
Q&A with SA sprinter Dambile ahead of World Champs