The US has nearly 6.9 million people - roughly 3.2% of the adult population - in prison or on probation or parole, a Justice Department report reveals.

More than 130,000 people were processed by the criminal justice system last year, according to the report.
Experts say the rise in numbers is the result of tough laws passed in the 1990s, which have led to more people being sent to prison - and for longer.