Anders Behring Breivik is a Norwegian far-right extremist responsible for the 2011 Norway attacks. He carried out a bombing in Oslo and a mass shooting at a Workers' Youth League camp on the island of Utøya, resulting in the deaths of 77 people. Breivik's actions were motivated by his anti-immigrant and anti-Islamic beliefs, which he outlined in a manifesto. In 2012, Breivik was convicted of terrorism and mass murder, receiving a 21-year prison sentence that can be extended indefinitely. His case raised discussions about terrorism, extremism, and the impact of radical ideologies in Europe.