Two U.S. Marine Corps AH-1W Super Cobra helicopters assigned to Marine Medium Tiltrotor Squadron (VMM) 262 (Reinforced), 31st Marine Expeditionary Unit fly in a tight formation over Clark Air Base, Pampanga province, Philippines, Sept. 30, 2014, during Amphibious Landing Exercise (PHIBLEX) 15. PHIBLEX is a bilateral training exercise designed to improve the interoperability, readiness and professional relationships between the U.S. Marine Corps and partner nations. (DoD photo by Lance Cpl. Robert Williams Jr., U.S. Marine Corps )