The document discusses several real-world advanced persistent threat (APT) attacks throughout history, including the first known cyber espionage incident called "The Cuckoo's Egg" in 1986, the Stuxnet cyber weapon used against Iran's nuclear facilities in 2010, and Operation Aurora which targeted major corporations like Google and Adobe in 2009. It defines APTs as targeted, advanced, persistent attacks usually carried out by well-funded nation-state groups, and outlines the common goals, phases, actors, and challenges of attributing APTs. The document concludes by providing further resources on APT reports, frameworks, and demonstrating attack techniques using Metasploit and Armitage.