'Ageing' Bolt takes second Rio gold

Usain Bolt won his second gold medal of the Rio Olympics, brushing aside all-comers again in his favourite 200m sprint but blamed his "ageing" body for missing his own world record. The Jamaican triumphed as Britain's Brownlee brothers dominated in triathlon to keep their country ahead of China in the medals race. Teenager Kimia Alizadeh became the first Iranian woman to win an Olympic medal in taekwondo.