Professor Jenny Pearce, who studies young people and public policy, said she believes the extent of sexual exploitation has not been acknowledged before because many people are inclined to see young people as "demons" rather than "victims".
She was asked if she welcomed the report:
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He has asked his followers for help in tracking the man down.
The president said it was a “very sad day for journalism”.
A summit has been pencilled in for February following last year’s icebreaker in Singapore.