This image was acquired from
wikimedia. It was marked as Public Domain or CC0 and is free to use. To verify, go to the source and check the information there.
Keywords from Image Description:
US Navy NW Lt. Dong Park explains how fuel cell vehicle works during Public Service Recognition Week on the National Mall in Washington D.C. en WASHINGTON May Lt Dong Park assigned to the Office of Naval Research science and technology reserve component explains how fuel cell vehicle works during Public Service Recognition Week