A horse is escorted by a groom during the third day trial of the horse race in Siena, Italy, August 15, 2018. A traditional horse race, known as "Palio di Siena" in Italian, is held in Italian historical city Siena, attracting tens of thousands of spectators. The horse race in Siena dates back to medieval period and is held on July 2 and August 16 every year. Three-day trials are held before the final race. (Xinhua/Jin Yu)?