Assigned to the 94th Pursuit Squadron, Cook was credited with seven victories including four balloons. During World War II, he was killed in a crash while flying a Curtiss P-40.

Distinguished Service Cross (DSC)
"For extraordinary heroism in action near Bois de Dole, France, August 1, 1918. Sighting six enemy monoplace planes at an altitude of 3,500 meters, Lt. Cook attacked them despite their numerical superiority, shooting down one and driving the others off." DSC citation

Distinguished Service Cross (DSC) Oak Leaf Cluster
"For extraordinary heroism in action near Crepion, France, October 30, 1918. Lt. Cook attacked three enemy bi-place planes at an altitude of 1,000 meters. After a few minutes of severe fighting his guns jammed, but after clearing the jam, he returned to the attack, shot down one of his adversaries in flames and forced the other two to retire to their own lines." DSC Oak Leaf Cluster citation