"In World War II, Lisbon, the capital of Portugal, was known as the City of Spies. During the war, Janus agent Josephine Baker traveled back and forth between France and Portugal, smuggling codes for the French Resistance. She also used her spy skills to help with the Janus Clue hunt. This photo was taken of planes flying near Baker's hotel. Are the strange markings simply decorations? Or could they be a Janus code?"