Air Force senior leaders hike on a glacier near Illulissat, Greenland, Sept. 12, 2017. The senior leaders were in Greenland, Canada and Alaska as part of Operation Uggianaqtuq, an Arctic Security Expedition to better understand the challenges of working in the climate and to build relationships with allies and partners there. (Tech. Sgt. Dan DeCook/Air Force)
An F-15E Strike Eagle receives fuel from a KC-135 Stratotanker during a mission over Iraq in support of Operation Inherent Resolve on Sept. 6, 2017. (Staff Sgt. Trevor T. McBride)
Cpl. Tyler Morrow, a rifleman with Company B, 1st Light Armored Reconnaissance Battalion, 1st Marine Division, preforms a functions check on his M240 machine gun during Deep Strike II in the River Valley, Calif., Sept. 13, 2017. (Cpl. Justin Huffty/Marine Corps)
Chief Ship's Serviceman Joann Maldonado, assigned to the submarine tender USS Frank Cable (AS 40), celebrates her advancement with a junior sailor on Sept. 16, 2017, during a chief pinning ceremony held at Naval Operations Support Center in Portland, Ore. (MC3 Alana Langdon/Navy)
From left, Sgt. John Harrington, a flight medic from Company C, 3-126th Aviation Regiment, sits next to Staff Sgt. Dave Gulino and Staff Sgt. Chris Moore -- all part of the crew of a Connecticut Army National Guard CH-47 Chinook helicopter from Company B, 2-104th General Support Aviation Battalion, while completing a survey mission in northern Florida, Sept. 13, 2017, after Hurricane Irma. (Spc. Lisa Crawford/Army National Guard)
