Iraq 10 years on: How Baghdad's road checkpoints work
Ten years after the fall of Saddam Hussein, bombings, killings and kidnappings are still frequent occurrences in Baghdad.
A network of checkpoints exists across the city in an effort to curb the violence.
In Baghdad a decade after he was there to cover the US-led invasion, Ben Brown explains how the checkpoints, which are now staffed by Iraqis, work.