Airman 1st Class Alexis Visser, 90th Munitions Squadron, and Senior Airman Rachel Silverberg, 90th Force Support Squadron, hike the Hidden Falls trail in Grand Teton National Park, Wyo., July 3, 2015. Visser and Silverberg were participants of an F.E. Warren Air Force Base Outdoor Recreation trip that explored the natural attractions of Grand Teton and Yellowstone National Park during the Fourth of July weekend. (U.S. Air Force photo by Lan Kim)