Helicopter Simulator Jack Boren, left, and his brother Grant, pilot a helicopter simulator during the USA Science and Engineering Festival in Washington, April 6, 2018. The boys are the children of Army Chief Warrant Officer 4 Jason Boren, who is stationed at Fort Knox, Ky. DoD photo by EJ Hersom SHARE IMAGE: Download Image: Full Size (1.29 MB) Tags: Science Tech Special, STEM Photo By: EJ Hersom VIRIN: 180406-D-DB155-002.JPG Photo Gallery