What is Islamic State, the group implicated in Germany stabbing? Check history, new tactics, and strength in Africa and Middle East

The Islamic State identified a Syrian man involved in a stabbing spree in Germany as its 'soldier.' The group, despite major setbacks, carries out significant attacks in Russia, Iran, and Oman, and maintains influence in regions like West Africa and the Sahel. A U.S. military operation recently targeted IS leadership in Somalia.