- January 7-9, 2015, France: Two men armed with Kalashnikov rifles storm the Paris offices of Charlie Hebdo, a weekly known for satirical caricatures of Islam and other religions. They kill 12 people including eight cartoonists and journalists as well as two police officers, before fleeing. A policewoman is killed just outside Paris the following day in a shooting investigators later link to the Charlie Hebdo attack. A gunman takes hostages at a Jewish supermarket, four of whom are killed. The Charlie Hebdo attackers and the hostage-taker are killed in separate shootouts with police.
- July 22, 2011, Norway: A right-wing extremist, Anders Behring Breivik, kills eight people in a bomb attack outside a government building in the capital Oslo and later murders another 69 people -- most of them teenagers -- when he opens fire at a Labour Youth camp on the island of Utoya. In August 2012, he was handed a 21-year prison sentence, which can be extended if he is still considered a danger to society.