The document lists the top 10 events since 1993, including the Unabomber's reign of terror in the US, the US invasion of Afghanistan in response to 9/11, Barack Obama becoming the first African American US President, several mass school shootings that changed safety policies, the Deepwater Horizon oil spill in the Gulf of Mexico, devastating earthquakes in Haiti and China, the 2004 Indian Ocean tsunami, Hurricane Katrina causing catastrophic damage in New Orleans, the 9/11 terrorist attacks, and the Rwandan genocide that killed over 800,000 people over 100 days.