About 300 life-size colourful canine sculptures go on show on the streets of New York on Wednesday.
Fact File
The tragedy's toll
2,823 people were killed
1,092 victims identified
105 people still missing
They were designed by top US artists and will be placed around parks and city squares to remind people of the tough work they and their handlers had to do.
The doggies will be on display until November, then they will be sold at an auction.
The money made will help train more rescue hounds.
Over 2,800 people died on 11 September when two hijacked airlines were deliberately flown into the World Trade Centre.
About 300 brave dogs and their handlers helped to find people trapped in the rubble of Ground Zero where the WTC towers collapsed.
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New York: after the attacks
