In 1922 the town of Chico, California was pelted by rocks
falling from an empty sky. A writer who called himself The Ghost took credit
for the phenomena, but was never identified. Similarly, in 1917 a stranger
appeared to government officials in Washington, D. C. and demonstrated a new
fuel made from water that could power an auto engine. After his successful
exhibition, the stranger vanished as quickly as he had appeared. The FBI and
Secret Service searched for months and could never find him.