Black and white image of boats used to transport men, powder, and supplies up and down the Colorado River in Black Canyon during the construction phase of the Boulder Canyon Project, better known as Hoover Dam. Note: Boulder Dam was officially renamed Hoover Dam in 1947.

Aerial view of Hughes Airport in Culver City, now Playa Vista, California. This private airport was owned by Howard Hughes and used for projects of the Hughes Aircraft Company and Hughes Tool Company. Lincoln Boulevard can be seen in the foreground, and on the left are Jefferson Boulevard and Ballona Creek.