Description: Horticulturist Hector Delgado took this photograph at 3:30pm. He first heard a high pitched humming sound which drew his attention away from his greenhouse work. The sound came and went, and then he saw, some 200m from his position and no more than 50m above the ground, a silver disc-shaped object moving smoothly, suspended in the air. He ran, grabbed his camera and took photos of the object.