50 years of IAH: Take a look at the airport in 1969 

Most photojournalist styles shots (including PR work) of the era were still shot on B&W film. As a matter of fact, most newspapers did not fully adopt color film until the mid-80s, when the cost of processing had dropped to a profitable level and printer technology was far more advanced. USA Today was the first newspaper to begin using color film on a regular basis.