In a gallery of photos hanging on the wall of a cavernous World War II-era hangar at Fairchild Air Force Base, Lt. Gen. Giovanni Tuck’s picture shows him smiling, between similarly beaming photos of Gen. Carlton Everhart and Col. Ryan Samuelson. The placement is not unintentional. Samuelson, commander of the base, reports to Tuck, who reports to Everhart, commander of the Air Mobility Command. The chain of command continues as, just three photos away, appears Secretary of Defense James Mattis. Then President Donald Trump.