The National Research Council Space Studies Board, in cooperation with the Aeronautics and Space Engineering Board, shall conduct a two-part study to address issues in the detection of potentially hazardous NEOs and approaches to mitigating identified hazards. Both tasks should include an assessment of the costs of various alternatives, using independent cost estimating. Options that blend the use of different facilities (ground- or space-based), or involve international cooperation, may be considered. Each study phase will result in a report to be delivered on the schedule provided in the contract. Key questions to be addressed during each phase of the study concern two areas: NEO Surveys and NEO Hazard Mitigation.