The document provides summaries of several significant historical events including: 1) The September 11, 2001 terrorist attacks in the United States that killed nearly 3,000 people after hijacked planes crashed into the World Trade Center towers and the Pentagon. 2) Hurricane Katrina in 2005 that was one of the deadliest and costliest hurricanes in US history, causing over $100 billion in damage along the Gulf Coast. 3) The 2004 Indian Ocean earthquake and tsunami that killed over 150,000 people across 11 countries, making it one of the deadliest tsunamis in history.