Commemoration Flight Army AH-64 Apache helicopters fly in formation over the island of Oahu, Hawaii, May 1, 2019, during an event to commemorate the 158th anniversary of the activation of the 6th Cavalry Regiment. SHARE IMAGE: Download Image: Full Size (0.54 MB) Tags: Army Photo By: Army Sgt. Ryan Jenkins VIRIN: 190501-A-EL257-0004C.JPG Photo Gallery