A CH-47 Chinook helicopter delivers a 155 mm howitzer and its gun crew to the Yukon Training Area, Alaska, March 7, 2018, during Automatic Big Rig. The live-fire exercise was part of the first gun raid in three years for 2nd Battalion, 8th Field Artillery Regiment, and it received helicopter support from 1st Battalion, 52nd Aviation Regiment. Army photo by John Pennell