The document summarizes key events related to terrorism from 1972 to 2007. It begins by discussing the 1972 Munich Massacre where Palestinian terrorists took Israeli athletes hostage and killed 11 Israelis at the Olympics. It then outlines several major terrorist attacks including the 1993 World Trade Center bombing, the 1995 sarin gas attack in Tokyo subway, and the September 11, 2001 attacks on the World Trade Centers and Pentagon. The document concludes by describing Operation Enduring Freedom, the US military operation launched in 2001 against al-Qaeda and Taliban forces in Afghanistan and other regions.