BBC news with Jonathan Izard.

The Jamaican

sprinter

Usain Bolt has become the first man to retain both the Olympics sprint titles. He won gold in the men's 200m final in London. He had already won the men's 100m race on Sunday. It's his 5th gold medal overall.

Look at Bolt gold. It's a three-meter lead. He is coming to the

homestretch

. He comes the record, running it down. B* and catch him. God, he is gonna do it again. What's the job, 19.32. Gold on the way, not just a silver.

Earlier, the Kenyan athlete David Rudisha won the men's 800m final in the new world record time 1:40.91. A wave from the track, British Nicola Adams became the first Olympic women's boxing champion. And in the lightweight category, Ireland's Kitty Taylor won her country's first gold medal of the Games. But Afghanistan's most promising Olympic competitor Rohullah Nikpah lost in the quarter finals of

taekwondo

.

Reports from the Syrian city of Aleppo say that the main force of rebel fighters has withdrawn from their key stronghold there after more heavy bombardment from government forces. Our Arab affairs editor Sebastian Usher reports.

It may only be temporary but for the moment, the Syrian rebels have

pulled out

their fighters from Salah al-Din district in Aleppo. Reporters on the ground confirmed what both the Free Syrian Army and the government have said about the pullout. The district has in recent days become the focus of the key battles so far in the Syrian conflict for control of the country's second city. Videos and photographs have shown the devastation wrecked in the area by the fighting. The rebels say it's a