1) The document discusses several disasters and tragedies including the Titanic sinking, 9/11 attacks, United Flight 93 crash, Hurricane Katrina, 1988 Yellowstone fires, 1889 Great Seattle fire, and 2000 Air France Concorde crash.
2) It notes various heroes and responses to each event, as well as lessons learned that led to reforms and improved safety standards.
3) Examples of "silver linings" mentioned are greater safety regulations, heightened community ties, and advances in emergency response.