File:Schmidt-Nixon-Clark-Good.jpg

Summary
Official photos of the US President, such as this one, can be assumed to be the work of government photographers. This was obtained from http://www.laskerfoundation.org/awards/library/aphotos/1970good.html ; it is also on other websites.

Left to Right: Benno Schmidt, Sr. (Sloan-Kettering), President Richard Nixon, R. Lee Clark (President, M.D. Anderson Cancer Center), and Robert A. Good. At the Conquest of Cancer Program, The White House, 1973.