It's 16 years since a Greater Manchester Police officer was killed in a raid on the flat of a suspected terrorist.
Detective Constable Stephen Oake was married with three children.
He died after being repeatedly stabbed.
And today a new national memorial to Stephen Oake and all police officers killed in the line of duty came a step closer - as former officer Paul Lander brought his fundraising challenge to Manchester.
Paul, the editor of Police Professional magazine, has embarked on a challenge to complete 100, Olympic distance triathlons in aid of the Police Memorial Trust.
As part of the challenge, he aims to visit forces across the country who have lost an officer while on duty.
Our correspondent Rob Smith has the story: