When the Islamic State group took over Mosul in Iraq in 2014 they flooded the internet with propaganda. One historian living in the city launched a counter-narrative online.
RAF crews have been talking to the BBC's Jonathan Beale about the challenges they face in avoiding civilian casualties in Iraq and Syria.
For the first time since the Islamic State group overran the city in 2014, its museum reopens.
After serving in the British Army, explosives expert Dave Parker joined a UN mine clearance team in Iraq.
- Copyright: BBC
The BBC has used the latest photogrammetry technology to re-create the tunnels in digital, 3D form so you can explore them as though you are right there.
By Sean Coughlan
BBC News education and family correspondent
UAE gives $50 Million to save Mosul landmark
By Jeremy Bowen
BBC Middle East editor, Mosul