The American aid worker was killed by his Isis captors on 16 November. Listen to the Guardian team tell, for the first time, of the daring and extraordinary effort to secure his release, which involved a radical New York lawyer, the US government and the world's most revered jihadi scholar Watch a video explainer on the secret talks to save Peter Kassig The long read: the race to save Peter Kassig

We're looking back at the revolutions in Tunisia, Egypt and Libya. With much of the region still in a state of ferment, what are the possibilities and dangers that lie ahead?

With the toll of cycling casualties growing, Hugh Muir asks what needs to happen for roads to become a safer place for bikes

Only half of those who took part in the summer riots said they felt a part of British society. We hear from five young Londoners on how they see their futures and their place in society

Unite's Rachael Maskell, Matthew Sinclair of the Taxpayers Alliance and Tom Clark discuss this week's public sector strike over the reform of pensions. With Hugh Muir

Hugh Muir examines the government's new housing strategy. Will it make any difference?

Analysis commissioned by the government suggests only 13% of those arrested in the UK's riots this summer could credibly be linked to gangs. So is a zero-tolerance approach to gangs missing the point?

Hugh Muir examines whether ex-servicemen and women are given the help they need to adapt to civilian life

Hugh Muir explores the political and business possibilities for post-Gaddafi Libya

Reverend Giles Fraser tells Alan Rusbridger how a protest on the steps of St Paul's Cathedral led to his resignation as canon