U.S. Air Force Col. David Williams, 39th Mission Support

U.S. Air Force Col. David Williams, 39th Mission Support Group commander, U.S. Air Force Maj. Matthew Shaw, outgoing 39th Logistics Readiness Squadron commander, and U.S. Air Force Maj. Francine Kwarteng, incoming 39th LRS commander, await the 39th LRS Change of Command ceremony at Incirlik Air Base, Turkey, June 13, 2018. (U.S. Air Force photo by Airman 1st Class Octavius Thompson)

David Octavius Hill was a Scottish painter and photographer. He was a pioneer of photography in Scotland and is best known for his collaboration with Robert Adamson in which they produced some of the most important early photographs of Scotland.

In 1843, Hill was commissioned to paint a group portrait of the leaders of the Free Church of Scotland, which became known as the "Disruption Assembly" painting. He then decided to photograph the same people in order to have a more accurate representation of the individuals. This commission led him to take up photography and he teamed up with Robert Adamson, who was a master of the new collodion process. Together, they produced a large body of work that depicted the people and landscapes of Scotland during the mid-19th century. Their photographs are considered some of the most important early photographs of Scotland, and are widely recognized for their technical excellence and artistry.