This is the shocking moment Anders Breivik launched his terror attack in Oslo.
New CCTV footage to be screened tonight by Norway's national television station shows the moment the bomb exploded outside the government's headquarters on July 22 last year.
Accusing his victims of fostering multiculturalism, the right-wing extremist detonated the bomb and gunned down participants at a youth camp on the island of Utoya, killing a total of 77 people.
Breivik was given Norway's maximum sentence of 21 years in jail, which can be extended indefinitely. He is expected to spend most of that time at the Ila prison near Oslo.
Captured by video surveillance cameras, the images show Breivik parking his white van at the very foot of a building tower that housed the prime minister's offices.
Breivik is seen getting out of the car in a security guard's uniform, and walking away briskly.
The video, which features comments by the security guard on duty that day also shows the damage caused by the bomb, which weighed nearly a tonne.
The prime minister was not in the building at the time, though eight other people were killed and several dozen were injured.
Breivik can also be seen leaving in a second vehicle, a grey Fiat van, which he used to drive to island of Utoya.