Witness: Events of the 20th Century tells the dramatic, revealing and sometimes moving stories that lie behind the headlines. These are the tales that have caught the public's attention and imagination across the world; tales of bravery and disgrace, of destruction and innovation, of despair and hope. Fear of disease plays on our primal instincts. What can be more frightening than something that can kill from within our own bodies? For every medical advance comes the set-back of a new disease craeting panic as it preads.