Irving Cummings’ THE JOHNSTOWN FLOOD (1926), a pioneering disaster and special effects movie, starring Janet Gaynor and George O’Brien, re-creates one of the greatest disasters in American history, when, in 1889, over 2,000 people in Johnstown, Pennsylvania, lost their lives. In her first major role, Gaynor plays a teenage girl smitten with dashing engineer O’Brien, ...