Aids 2012 conference and the clinic for athletes at the 2012 London Olympics.
Would tighter gun laws lead to fewer gun deaths? Also: how Olympians have changed.
A report on London through the ages via a captivating app
Live news and current affairs, business and sport from around the world.
A review of the week with the latest news.
Interviews, news and analysis of the day's global events.
The protective ozone layer could be affected by climate change and more chaotic weather
Monday 30 July 2012