A 38-year-old Strabane man caught with 530 indecent images of children on his computer has been jailed for a year.
In March 2005, police searched Mark Maguire's home and found more than 500 child abuse images on his computer as part of the US-led Operation Ore.
US authorities had given them the names of 15 Northern Ireland people who had accessed child pornography sites.
Maguire, who also has an address in St Johnston, Donegal, admitted 50 specimen charges of making indecent images.
The offences were committed between 28 April 2003 and 8 May 2004, Dungannon Crown Court was told.
Maguire agreed to a three-year probation programme and must sign the police sex offenders register for the next 10 years.
He must also allow police to have access to his home and computer and was banned from any unsupervised contact with children "save for situations beyond his control" and from owning a mobile phone with internet capabilities.
Judge McFarland told Maguire the measures were more for the "protection of the public rather than punishment".
The judge said the children in the pictures were victims of a "modern day slave trade".
"It is an appalling abuse of these children," he added.
"Some (of the images) are no doubt created in the UK, but the vast majority come from the third world and these children are clearly living an appalling life, being abused in an appalling way."