In pics: roller speed skating event at Summer Youth Olympics

Gabriela Isabel Rueda Rueda (L) of Colombia, Honorine Barrault (Back) of France and Giorgia Valanzano (R) of Italy compete during the women's combined 500m sprint final of the roller speed skating event at the 2018 Summer Youth Olympic Games in Buenos Aires, Argentina, on Oct. 8, 2018. (Xinhua/Li Ming)