U.S. runner finishes Olympic relay lap on broken leg

Canadian men claim relay bronze, breaking 20-year-old national record - The Globe and Mail

London Olympics 2012: Oscar Pistorius finishes last in 4 x 400 final

US men and women both fumble batons

Record broken, medal won and job done for men's 4x100m athletics team - Team Canada - Official Olympic Team Website

Tokyo Olympics end on a high for US men with victory in 4x400m, REPORT

VIDEO: Allyson Felix's 11th Olympic medal comes in US 4x400 relay

American runner finishes Olympic relay lap on broken leg

Track star Allyson Felix makes history with gold in final Olympic race in Tokyo

U.S. Runner Finishes Olympic Relay Leg on Broken Leg – NBC Bay Area

US runner finishes Olympic relay lap on broken leg, Sports

Dallas' Sha'Carri Richardson anchors U.S. women's relay win at world championships

World Record gold for Rosey Effiong in USA mixed relay