The UK's military focus is shifting to remote-control warfare using armed drones. But the move is surrounded by a wall of secrecy.
A Vatican document links a hot planet to world poverty and the need for change. Its immediate impact may be on the United States presidential race.
The resilience of Islamic State a year after its breakthrough makes an escalation of the current war inevitable.
The United States military at last shows some awareness of how hard the current conflict will be, and how deep it will have to go.
The story of a Pashtun hero of peaceful struggle needs to be told, now more than ever. An original new book does just that.
Islamic State's takeover of Ramadi and advance on Palmyra show that the options facing Washington in Iraq-Syria are ever narrowing.
How do young recruits to Islamic State from the west see their campaign? A fifth personal communication from inside the group.
The combination of expensive military projects at a time of austerity should, after the election on 7 May, create the space for an overdue rethink of the UK's international security policy.
The pace of reaction to the global climate emergency is increasing, and vulnerable states in the global south are often in the lead.
The drowning of would-be migrants attempting to reach Europe is a humanitarian tragedy that reflects a growing crisis of environmental security.
The experience of fighters on opposite sides of the "war on terror", marking the 700th column in this series.
A powerful coalition seeks to destroy the 'caliphate'. But IS draws confidence from key assets beyond the reach of a blunt military strategy.
