Before the advent of regular scheduled inflight motion pictures, passengers had little to do besides talking, reading, sleeping or peering out of the window. Although, the mode of transportation was the most advanced for its time, it was found lacking in the entertainment department. The first movie screening was in 1921 when eleven passengers in an Aeromarine Airways flight onboard a curtiss F-5-L flying boat watched Howdy Chicago! , a film promoting the city of Chicago using a DeVry suitcase projector. Soon after, in 1925, passengers on board an Imperial Airways World War 1-era Handley-Page Bomber watched part of The Lost World , a 70 minute film, during a 30-minute flight near London. Transcontinental Air Transport equipped their passenger aircraft with screens and projectors to show silent films onboard although the noise of the huge radial engines would have drowned out the sound anyway. All these efforts were experimental and movies were not shown regularly.