As Barack Obama heads for Moscow for talks with Dmitry Medvedev, Luke Harding reports from Moscow on the frosty relationship between America and Russia.
The wife of the new MI6 chief, Sir John Sawers, posted information about their family on Facebook. James Sturcke looks at the security fears that have prompted the Liberal Democrats to call for an inquiry.
The Observer's Peter Beaumont visits Gaza to see whether life has changed for Palestinians six months after the Israeli war with Hamas.
The second man on the moon, Buzz Aldrin, talks to Stephen Moss about the Apollo 11 mission 40 years ago and how he struggled to adjust to life back on earth.
Chris Anderson, author of The Long Tail, tells Tech Weekly's Charles Arthur why we should welcome the proliferation of free stuff made possible by digital technology.
