An Iranian boy exercises using carved blocks of wood, called a mil, in a Zurkhaneh "House of Strength" in Karaj 45 km west of Tehran August 20, 2007. Wrestling offers one arena where Iran and its arch-foe, the United States, can put aside their differences, with about 20 American athletes and their coaches taking part in a competition in Iran last January. To match feature IRAN STRENGTH/ REUTERS/Caren Firouz (IRAN)