Rain-generated flash floods and the accidents, devastation and loss of life that can occur from these storms

San Francisco Earthquake October 17, 1989 and its aftermath. The largest to hit the San Francisco area since 1906 and registering a 7.1 magnitude, the earthquake's effects are shown in stores, and on the street. California Highway Patrol's response to, and findings of, the seismic shaking on the San Francisco-Oakland Bay Bridge and the Cypress Street Viaduct. Scenes show difficult rescue attempts and earthquake victim evacuations.

Footage of Sept 11 2001 attack in New York and Washington DC and reactions

Footage of Sept 11 2001 attack on World Trade Center and Pentagon and Americans reaction