U.S. Army Sgt. Andrew Atkinson, a UH-60 Blackhawk helicopter crew chief with Company B, 3rd Assault Helicopter Battalion, 227th Aviation Regiment, 1st Air Cavalry Brigade, 1st Cavalry Division, acquires a fuel sample from his aircraft as part of pre-flight checks at an airfield in Lielvarde, Latvia, May 7, 2018. Atkinson is preparing the UH-60 Blackhawk helicopter for Operation Hedgehog, a multinational exercise held in Estonia to enhance readiness and interoperability between allies and partners training in the Baltic region. U.S. Army photo by Sgt. Gregory T. Summers / 22nd Mobile Public Affairs Detachment