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:
G PGH mounted police advance. Mounted riot police move back protesters and other assembled citizens at an unorganized congregation near the Frick Fine Arts Building near Phipps Conservatory Oakland Pittsburgh United States during the September summit own DarApe Public Domain Demonstrations and protests against the Pittsburgh summit