Evan Horowitz and Dee O Gee, his guide dog in training, pose in Langley Research Center’s flight hangar. Evan is LaRC’s Structural Airworthiness Engineer. When an experiment is installed on NASA aircraft, research equipment is mounted inside and/or outside (in the breeze). Also, structural modifications to the aircraft may be needed to accommodate these equipment mounts. Evan’s job is to make sure that all structural modifications are safe to fly.