The USAF proposes to improve an existing airport or airports and associated infrastructure in support of expanding mission requirements in the western Pacific. Under this action, the USAF proposes to construct facilities and infrastructure at an existing airport or airports to support a combination of cargo, fighter, and tanker aircraft and associated support personnel for divert landings, periodic exercises, and humanitarian assistance and disaster relief. Unplanned divert landings and humanitarian assistance and disaster relief would occur at the airport or airports proposed for improvements as required. The purpose of the Proposed Action is to establish additional divert capabilities to support and conduct current, emerging, and future training activities, while ensuring the capability to meet mission requirements in the event that access to Andersen Air Force Base (AFB) or other western Pacific locations is limited or denied. The USAF has determined that an EIS is required for this proposal. Topics considered in the impacts analysis are those determined, through both the internal and public scoping processes, to be relevant to the Proposed Action, and include noise; air quality; airspace management and airport operations, and bird/wildlife aircraft strike hazard; geological resources and soils; water resources; terrestrial biological resources; marine biological resources; cultural resources; recreation; land use; transportation; hazardous materials and waste management; infrastructure and utilities; socioeconomics and environmental justice; and human health and safety.