Assistant Air Base Fueler from the Santa Maria Air Tanker Base Elena Rios with U.S. Forest Service monitors water being pumped into a MAFFS unit on a C-130 air tanker during training at the 146th Airlift Wing in Port Hueneme, California on May 4, 2016. Air National Guard and Reserve units from across the U.S. convened for MAFFS (Modular Airborne Fire Fighting Systems)annual certification and training this week to prepare for the upcoming fire season in support of U.S. Forest Service.